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- A recent McDonald's commercial plays with this trope with a young teenage girl who apparently approaches a mirror and performs a dance routine before "reaching through" to pick up the "reflected" drink, at which point it becomes apparent that this trope was being performed with twin sisters.
Anime & Manga
- A variation of this is done in Cardcaptor Sakura. The Mirror card deliberately mirrors Sakura's actions in order to reveal its identity.
- Naruto: Shikamaru and the rest of the Nara family pull this off by way of their Shadow Pin ninjutsu. To paraphrase an enemy, "You got ahold of my shadow, so now we marry each other's movements."
- My Lovely Ghost Kana: Daikichi and Kana are cleaning opposite sides of a window and go through a short routine, then burst out laughing at each other.
- On Panty & Stocking with Garterbelt, Chuck's Evil Counterpart Fastener stands in front of a mirror that Chuck is examing. Chuck starts goofing off with Fasterner mimicing his actions. Then Fastener smacks Chuck in the face, and zips behind him before he can get reoriented. With Fasterner's reflection now in the mirror, Chuck tries to punch him...and rips his hand open on the glass.
- Mega Man NT Warrior has Yuriko and Mariko doing this, mainly because Mariko thought Yuriko was her reflection due to their very similar appearance. Yuriki then hypnotises Mariko to forget she ever saw her and disappears.
Films — Live-Action
- The Trope Maker might be 1916 Charlie Chaplin film The Floorwalker, in which the Tramp runs into his Identical Stranger, in the person of a department store floorwalker. The Tramp and the floorwalker mimic each other's movements for a while until Charlie is reassured that the floorwalker is real by reaching out and touching his valise.
- In Barney and Friends, two characters perform the clown version of this.
- The Marx Brothers do this in Duck Soup. The definitive version that everyone copies. The gag was old when the Marxes did it, dating from vaudeville and being used in several silent comedies in the '20s, though they subvert it niftily at one point when Groucho and Harpo walk around each other but continue imitating each other afterward.
- A variation shows up in the Buster Keaton film Sherlock, Jr. — Buster stands in front of what appears to be a full-length mirror, then steps through, revealing that it's a door connecting two identical rooms.
- Max Linder, in the 1921 silent comedy Seven Years Bad Luck, in which Max's servant is trying to hide the fact that he's broken his master's mirror.
- Another silent-era example: Charley Chase, in his 1924 short Sittin' Pretty. (which, incidentally, was directed by the same director who went on directing... Duck Soup.)
- Like every other slapstick trope, this one was used on occasion by The Three Stooges — usually Curly.
- Played with in the Bette Midler flick Big Business. She's playing identical twins who don't know about this, and meet for the first time — walking along a mirrored surface. Neither wants to foil the other, they just happen to do the same movements at the same time — except, you know, mirrored. (Video)
- Used in Airheads when Pip first leaves the radio station. He encounters a police officer, and they perform the basic routine. Pip tries to throw off the cop with some kind of dance move, but the officer reaches for his gun, causing the inept rocker to flee.
- Sarah Jessica Parker made a dance movie in the 1980s called Girls Just Want to Have Fun. During the final round of competition, twin dancers successfully pull off a quick intro that way and are called Mirror Image.
- This happens in the TV movie Model Behavior, except the lookalikes are unintentionally copying each other's movements.
- Lampshaded in The Monkees' film Head. Peter thinks Davy's trying to do "the old mirror routine" in the studio restroom, but Davy's actually trying to warn Peter about a huge Magical Eye in the mirror.
- Done in the Vincent Price vehicle Dr. Goldfoot and the Girl Bombs, between Price's title villain and Ciccio Ingrassia's hero/comedy relief.
- There is a deleted scene in Terminator 2: Judgment Day where Sarah Connor installs new hardware into the head of the Terminator while he sits in front of a mirror. In the movie, the mirror and its reflections are genuine. In real life, Linda Hamilton's identical twin stood on the other side of the mirror and copied her sister's movements. This was done so that the camera could make a continuous shot from the back of the Terminator's head (actually a dummy) to looking down inside it; Arnold sat on the other side of the fake mirror while Leslie Hamilton pretended to fiddle with his head. Also, it's done to fool us the audience, and you know what? it works.
- In the second Garfield movie, A Tale of Two Kitties, Garfield and Identical Stranger Prince do this when they finally meet, over a hedge arch. They desynchronize once Garfield tries some wicked dance moves, although it's Garfield's bad breath that's the last straw for Prince.
- Done in The Nutt House, when two identical twins finally meet.
- Also used in Repli-Kate: Kate and her clone both mistake each other for a reflection, unintentionally mirror each other's movements, and walk away without a clue what just happened.
- Roberto Benigni does a quick mirror routine with an Identical Stranger in Johnny Stecchino.
- In the unused script for Back to the Future Part II, old Doc Brown travels to the sixties and has to avoid being seen by young Doc Brown by hiding behind an empty mirror frame. "Great Scott! I look terrible!"
- Variation of sorts in The Pink Panther where Sir Charles and his nephew are cracking a two-sided safe, unaware of each other, wearing identical gorilla costumes.
- Sleeper is an homage to silent film slapstick — at one point, Woody Allen does the routine shaving at a futuristic mirror, where he notices his reflection is just a bit off-sync.
- In A Girl Walks Home Alone At Night, the vampiric Girl taunts Hossein like this as she stalks him on the opposite side of a street.
- A surprisingly horrifying example in 1408: the protagonist tries to articulate his troubles by gestures to a stranger he sees in the window of the house across the road. He manages to attract attention to himself, but then the stranger suddenly begins repeating protagonist's own moves. And when the hero finally realizes that he sees his own reflection in the opposite window, the reflection gets attacked from behind...
- Played for dramatic effect near the end of The Big Over Easy (book kind-of spun off from Thursday Next).
- Inversion: In Ares Express by Ian McDonald, Sweetness searches through a mirror maze for one image that doesn't match her every move, because it's an independent virtual-reality copy of her.
- In Fawn and the Mysterious Trickster, Fawn pranks Beck by dressing up as her and pretending to be her reflection.
- Partially applies to a scene in Witches Abroad, where Lily rushes into her mirror-filled room and mistakes Granny for one of her own reflections, as she's standing in the frame of a broken one. Justified in that Granny was dressed similarly to Lily, they're sisters who look a lot alike, and Lily's ordinary reflections don't move perfectly in synch with her, due to her excessive use of mirror-magic.
- In Galaxy of Fear: The Nightmare Machine, Zak ends up in a hall of funhouse mirrors that, with holographic aid, distort reflections in improbable ways. After a while in there he comes across Lando Calrissian, assumes he's a particularly cool-looking reflection, and tries posing. Lando grabbing him is one of the book's Pseudo Crisis chapter ends.
- In one Lord Peter Wimsey short story, a man who suffers from a chronic fear of doppelgängers meets his long-lost Evil Twin when he mistakes him for a reflection in a glass door, then has a panic attack.
- This sketch was done as a performance in The Vicar of Dibley: Rather slim prima ballerina Darcy Bussel in a famous cameo is reflected by not-at-all slim Geraldine.
- This is a plot point in the episode "The Tailor's Dummy" of Jonathan Creek, inspired by Duck Soup, to bluff that one man was the murderer.
- Lucy and Harpo Marx, in an episode of I Love Lucy, echoing the famous scene from Duck Soup.
- One episode of Gilligan's Island involves a Soviet spy who has undergone plastic surgery to resemble Gilligan landing on the island. When the two Gilligans come face to face, the spy tries to convince the real Gilligan that he is looking into a mirror. Gilligan manages to trip the spy up by acting like he is going to sneeze and then stopping halfway through.
- Happens a few times in The Benny Hill Show, usually with Benny in drag mirroring a woman. The "disguise" fails when they start to strip....
- Done in an episode of The X-Files. In the Season 6 two-part episode "Dreamland", Mulder switches bodies with a man in black. When he later looks in the mirror, the two actors (David Duchovny and Micheal McKean) perform this trope.
- Scott Bakula did the same performance with dozens of other actors on Quantum Leap, for pretty much the same reason.
- Done in an episode of MADtv spoofing Heroes, where Nikki (the one with the split personality) believes the "her" in the mirror is someone different, and performs a series of elaborate stunts in front of the mirror to prove it.
- A contender group in the Japanese talent show Kasou Taishou had done a mirror room dance involving one girl dancing with five other girls as mirror images mimicking the dancer. This got them first place.
- Parodied in a Saturday Night Live sketch parodying The Swan in the episode hosted by the Olsen twins. One twin played the contestant looking at herself in the mirror; the other played the mirror image, deliberately off-sync with the other. The "image" even hands the other a tissue when she starts crying!
- In the first episode of Sister Sister, Tia and Tamara simultaneously brush their hair a bit (like, out of one eye) while standing on either side of an empty frame. Neither knows about the existence of the other until later in the episode.
- The Muppet Show:
- In an episode, Kermit checks his appearance in an empty frame; on the other side is Scooter's wind-up TV show host that looks exactly like Kermit, except for the wind-up key in the back.
- In a later episode, a sketch features Gonzo testing this when performing "Act Naturally" opposite his reflection, who refuses to mimic the "ludicrous things" he does.
- Done with Kermit and Evil Twin Constantine in Muppets Most Wanted.
- A musical incorporating the songs of George Gershwin, Crazy For You, has the unintentional version happen partway through. Both characters (one is disguised as the other) are drunk (due to lost love), and don't realize they're not seeing a reflection until one raises their glass in a toast and the other doesn't. They both shrug it off.
- The Legend of Zelda: Ocarina of Time: The battle against Shadow Link starts off like this and goes on for about a minute or so before he starts attacking on his own.
- In the first Paper Mario, some shape-changing enemies try to pull this in the seventh dungeon, an ice palace, where every room looks like it has a mirror covering its wall, but is actually divided by a giant wall of glass. Eventually you find a hole in the "mirror", and bump into your "reflection".
- Sonic Generations: Before fighting the Death Egg Robot, Classic and Modern Sonic both walk up to a glass window in the wall separating them and perform this gag. The perspective the player sees it from depends on which Sonic they used to enter the boss portal from the hub world. In Classic Sonic's perspective, he realizes the trick after Eggman speaks. In Modern Sonic's, he doesn't notice until Classic Sonic runs off.
- Super Mario 64 did it to simplify the graphics processing. In story, a room had a large mirror on the wall. The game actually used a mirrored room, a duplicate of Mario, and an invisible force field. Not a perfectly mirrored room, of course. The trick in that room is to find something that isn't a perfect mirror and use that as a level entrance. In the remake, Luigi can phase through the mirror into the copied room, where things get weird.
- In the first Tomb Raider game and its remake, there is an Atlantean creature who looks like a muscular structure of a human who copies Lara's movements exactly.
- In Crash Bandicoot 2: N-Tranced the fight against Fake Crash has him copying the player's movements. If you touch him you'll die, so to damage him you had to lead him into the traps in the stage without getting killed by them yourself.
- In the RuneScape quest "Broken Home", you encounter the ghostly Mysterious Waif in a room, with a pane of glass between you. She doesn't respond if you speak to her, but if you mimic her actions like a mirror, you can make her smile. Turns out, it was a very good thing that glass was separating you...
- A version of this appears in Batman: Arkham City, albeit so subtly that neither the player nor Batman notice until the end of the game: when Batman arrives for their second confrontation, Joker is seen adjusting his makeup in a large mirror; though he has his back to the door, it's clear from his reflection that he's still horribly diseased and likely within hours of dying. However, when the Joker turns around, he appears perfectly healthy. It's not until the end of the game that Batman discovers that Joker has actually hired Clayface to act as his Body Double; the "mirror" was just a pane of glass that the real Joker was hiding behind, Clayface being able to mirror his bosses mannerisms almost perfectly as he put the finishing touches on his disguise. If you look carefully at the mirror during this scene, you can even get a glimpse of the real Joker ducking out of sight.
- Stick figures can do it too, as seen in anti-HEROES with ghost illusionist Kaalinor stumbling upon the very mook he took the appearance of.
Kaalinor: Wow! That was totally awesome! I can't believe I stayed in sync with you for so long!
- The protagonist of Chopping Block once did this with Jason (both wear hockey masks).
- When the title character of Ruby Quest leaves a room and returns, what was a window into another room seems to have changed into a mirror—at least, the figure on the other side perfectly mimicks Ruby. When she's forced to smash the glass, however, the figure remains, and its face distorts as it squeezes into the room.
- Cracked's The 6 Most Mind-Blowing Ways Your Brain Can Malfunction mentions a mental disorder called mirrored-self misidentification, in which someone looking into a mirror believes that the monster in the mirror is an intruder performing a Mirror Routine, not oneself.
- On ScrewAttack, a Clip of the Week video has the staff opening a portal to an alternate dimension and meet with their dopplegangers. Stuttering Craig and his double (played by Craig's brother) silently size each other up. Then they whack each other in the crotch.
- Classic Disney Shorts
- In the Mickey Mouse cartoon Lonesome Ghosts, a ghost does this to Goofy, who mentions at the beginning, "For a moment I thought it wasn't me." After a while of doing this, Goofy finally catches on and says, "I know you, you're a ghost!"
- In the Chip 'n Dale cartoon Two Chips and a Miss, both Chip and Dale do this thinking they both saw a reflection of themselves to straighten their tuxedos when they were both secretly invited to a club.
- Looney Tunes:
- Bugs Bunny does this to Elmer in the cartoon Hare Tonic to convince Elmer that he is turning into a rabbit.
- Daffy Duck does this in The Impatient Patient and Draftee Daffy.
- On the short Bell Hoppy, Sylvester has to put a bell on Hippety Hopper, and after various failed attempts, he tricks Hopper into putting the bell on himself with a mirror routine.
- Tom and another cat did this while fighting over Jerry in the Chuck Jones Tom and Jerry short Cat and Dupli-Cat.
- An episode of Xiaolin Showdown has an evil mime do this to Clay. It ends when he tries to mirror-punch himself in the head.
- Fred Flintstone does this on Billy's dad in The Grim Adventures of Billy & Mandy once. Apparently, Billy's dad catches on eventually, and keeps going after Fred has left.
- Count Duckula, in the episode "One Stormy Night".
- Family Guy does this with Hitler vs. Stewie disguised as Hitler, a shot-by-shot remake of the infamous Marx Brothers skit in the episode "Road to Germany".
- Legion of Super Heroes has a shapeshifter escaping from the heroes this way. He has the advantage of being on the other side of glass.
- A common gag on Scooby-Doo, usually with Shaggy as a participant. Sometimes it is the Fake Monster of the Week doing the copying, other times it's Shaggy trying to fake out his pursuers.
- In "Never Ape an Ape Man", this happens with Scooby, with the villain wearing a very realistic latex Scooby-Doo mask but with his true hands exposed.
- It happens again in "Scooby's Gold Medal Gambit" when the Chameleon disguised himself as Scooby, this time in full-body, even though the suit part was not as detailed.
- A serious (and more realistic) variant was used in an episode of What's New, Scooby-Doo?, in which a photograph thought to show a boy looking into a mirror turned out to be an image of identical twins, posed as if doing a Mirror Routine.
- Seen in the Paramount/Trans-Lux version of Felix the Cat entitled "Felix the Cat Suit", when as another scheme to steal the magic bag, the Professor disguises himself in a strange inflatable Felix the Cat costume, removes the glass from Felix's mirror and readies himself; once the real Felix arrives and begins combing his hair in the mirror, he is shocked to see a larger, fatter and permanently-grinning version of himself as his "reflection." Felix figures that he is either getting the mumps, is getting fatter, or the mirror is out-of-focus. But then a bee comes along and pokes the "reflection" with its stinger, causing the Felix suit to blow up and give the game away.
- Done by Chuckie and Donnie in the Rugrats/The Wild Thornberrys Crossover "Rugrats Go Wild".
- An Easy Amnesia episode of Donkey Kong Country includes this... in song.
- The TaleSpin episode "A Bad Reflection on You" features a scene like this.
- Jackie Chan from Jackie Chan Adventures and an evil clone.
- When Jackie first met Viper, they were dressed identical when they passed, causing Jackie to think he was looking in a broken mirror.
- Dinobot from Beast Wars and... likewise.
- Parodied in the Adventure Time episode "Marceline's Closet", when Finn spots Jake in Marceline's house, and Jake tries to pose as Finn's reflection in the window (only he mirrors Finn's movements the wrong way around).
Finn: Jake, get outta there! Marceline's gonna kill you! Jake! I know this isn't a mirror! What the— You're doing it WRONG, even!
- Rainbow Dash from My Little Pony: Friendship Is Magic does this in "A Canterlot Wedding Part 2" with the first Changeling to take her appearance, complete with a subtle lag in the latter's movements.
- Taz-Mania: A spy (who, naturally, looks nothing like Taz) does this to Taz in "Yet Another Road to Taz-Mania".
- In The Perils of Penelope Pitstop episode "Big Top Trap", the Hooded Claw, disguised as Clyde ("One more clown Clyde won't be noticed"), does it by putting a mirror frame between himself and the real Clyde in the circus.
- Timid Smurf (later known as Actor) does this to Brainy in The Smurfs episode "All the Smurf's a Stage".
- In The Little Rascals animated short "Rascals' Revenge", Butch does this to Alfalfa in the abandoned house.
- Done as a prank.
- Another prank, done by Improv Everywhere.
- This mirror routine between two similar-looking cats proves that this can happen in real life unintentionally.
- The "mirror test" for animal intelligence is whether or not animals can recognize their own reflection in a mirror as such, or think it's an intimidating, scent-less stranger whose every action matches their own.
- The Mission: Impossible – Rogue Nation special effects team used this to film Benji's Imagine Spot about donning a Latex Perfection mask. In the movie, Benji has the mask fitted, then the camera seamlessly pans to a mirror showing his disguised reflection. In reality, Benji's actor, Simon Pegg, sat in front of a hole with a mirror frame around it, facing a flipped duplicate of the set. The man Benji wanted to disguise as sat on the opposite side of the hole, and copied Pegg's motions as best as he could. Ilsa's actress, Rebecca Ferguson, also had a body double portray her reflection in the scene. Reversed in Ethan's case, as Tom Cruise played the reflection, and his body double filled the role of the "real" Ethan.