John Belushi in Animal House turns to give the camera his trademark single raised eyebrow after he climbs the ladder to look into the sorority house window and discovers the girls in the midst of a semi-nude pillow fight.
Eddie Murphy does this in Trading Places when the Duke brothers condescendingly explain that you might find bacon in a bacon, lettuce and tomato sandwich.
Eddie Murphy as Prince Akeem does this again in Coming to America when Imani Izzi, his Queen-to-be who was raised from birth to do anything to please him, goes as far as barking like a dog when asked.
Oliver Hardy was a master of this. While uproariously funny in itself, it was often used to pad out a gag to give the audience time to finish laughing so they wouldn't miss the next bit of dialog.
22 Jump Street has this done by Jonah Hill's character. On the DVD commentary Hill explains that his dialogue for the scene in question was improvised, and he literally peeked over to the director to see whether or not the ad-libbing made him laugh.
Victor the navigator smiles at the camera when Randy sings "River of Jordan".
Ted's unexpected turn to camera for "What a pisser!"
In the last scene, Otto the Autopilot turns his head to face the audience and salutes. A short time later, after gets an inflatable female companion he turns his head to the audience again and winks.
Aladdin (2019): Genie reminds Aladdin he made his first wish to get out of the cave. But Aladdin forgot who made that wish and reveals the Genie watched it glancing at the camera telling the viewer.
Birds of Prey (2020). Harley is talking with Cassandra Cain in a vehicle. When Cassandra says she can't give Harley a diamond because she swallowed it, Harley glances at the camera with a frustrated look on her face.
In Death Proof, Stuntman Mike smiles at the camera before getting in his car.
In Dora and the Lost City of Gold, Dora turns to the camera, much like the Nickelodeon series, and speaks to the audience. Her parents look in the same direction, from a different camera angle, and say, "Who is she talking to?"
Elves (2017): After sealing his little brother in the oven and turning it on, the boy possessed by the elf doll turns and looks at the camera.
In the film of Evita, Che does this frequently, most notably at the end of "Good Night and Thank You".
Fatal Instinct. Lola Cain turns and looks at the audience after Ned Ravine turns her down.
Played for Drama in A Field in England. In the scene where Whitehead is led into a tent, presumably to be tortured, Friend and Jacob kneel with their heads bowed. Jacob then looks up into the camera with an apprehensive expression.
Tyler looks at the camera in Fight Club after Marla's particularly disturbing pillow talk ”My God, I haven't been fucked like that since grade school.”
In both versions of Funny Games, this is how Paul first breaks the fourth wall. Just before Ann/Anna discovers the where he's hidden the dog, he turns around and gives a Slasher Smile to the camera.
The Gingerweed Man: Barbara makes one at the end of the movie to voice her displeasure.
Harold has a huge one in Harold and Maude after convincing his arranged date that he's set himself on fire in the backyard, causing her to run away screaming.
Kevin of Home Alone acknowledges the audience a couple of times, usually for expository purposes; "I made my family disappear!" But the best example of this trope occurs in Home Alone 2. He addresses the man next to him on a plane, who then begins babbling extensively in French. Kevin slowly turns and gives a good long "Why me?" look at the camera.
An unintentional example in Hot Fuzz: Timothy Dalton's eyes, for a split second, stare right down the barrel of the camera. Director Edgar Wright apparently found it amusing enough to leave in the finished film, also timing the faint sound of an old-style cash register in the background to coincide with it.
Danny: What was it like being stabbed? Angel: It was the single most painful meeting of my life. Danny: What was the second most painful? Angel: (stares directly at the camera)
Topper: Do you have any idea what would happen if you stay here with me? Ramada: Of course I do. Sex. Wild, free, passionate, unbridled sex. I would fondle you in ways you can't imagine. I would pleasure you at any time, in any place, in any way, for as long as you could possibly desire. Topper: [aside glance, complete with arched eyebrow]
The Hunger Games: Haymitch sends Katniss some soup to feed Peeta with. Enclosed is the note, "You call that a kiss?", referring to a kiss on the cheek she gave Peeta earlier. Katniss promptly pulls this trope, though in the context of the film this doesn't break the fourth wall as she's aware her every action is being televised.
At the end of Imagine Me & You, the male lead Heck meets a beautiful girl on a plane and gives the camera a quick smirk.
In Like Flint. In the end, the three leaders of the feminist conspiracy assure the President that they accept that the world is better in male hands. They then turn to the audience and give knowing looks, indicating that they have no intention of giving up on their plans of world domination.
One early example has Jay and Silent Bob talking to Holden McNeil about their plans to stop the Jay And Silent Bob Show Within a Show from being made. Holden tries to tell them that the project won't go anywhere anyway, saying "A Jay and Silent Bob movie? Who would pay to see that?", which is immediately followed by all three of them looking at the camera. Silent Bob smiles.
A cop tells Federal Wildlife Marshall Willenholly that someone may have arranged a breakout of animals to draw attention away from a jewelry robbery. He says that sounds like something out of a bad movie, and all the characters turn to look at the camera. An angle change reveals that they all just happened to look along the road at the same time.
And when Jay and Silent Bob finally get to the Hollywood filmset, they come across Matt Damon and Ben Affleck as they argue about their current roles in Good Will Hunting 2: Hunting Season. They take pot shots at various movies both have done, until finally, Affleck says, "What do I keep telling you? You gotta do the safe picture, then you do the art picture. And then sometimes you gotta do the payback picture because your friend says you owe him." [Both look at camera.]
In Jumanji, Peter is sent on a frantic run out to a garden shed to get an axe. Arriving there, he finds a padlock on the shed door. Fortunately, there's an axe lying nearby! He picks up it and... starts to whack at the lock. Belatedly, he realizes what he's doing, shoots an embarrassed look at the camera, and runs back inside.
Jurassic World: Fallen Kingdom: Somehow they managed to accomplish the feat of having a DINOSAUR give one of these. The hyper-intelligent Indoraptor is smart enough to figure out what tranqs do and plays possum after being hit by a few. Once the man who shot him gets close enough, she has just enough time to flash the audience a look, as well as a subtle Slasher Smile before going in for the kill.
Yuri glances at the camera twice in Werewolf (1996). Given the context of both scenes, it's likely that neither Aside Glance was intentional, but the crew treats them as such for the sake of their jokes.
(Yuri, disguised as a doctor, examines a patient and then looks at the camera) Tom Servo: Audience, what's your diagnosis?
They do this a lot. In Cave Dwellers the elder and his daughter are having a conversation about what to do with the MacGuffin when the elder steps away as if lost in thought but is accidentally looking straight at the camera:
Tom Servo: What do you, the viewers at home, think?
The Naked Gun series of movies contain these regularly.
Taj in National Lampoon's Van Wilder: The Rise of Taj does this at least twice, on both occasions because he's pleased a woman is paying attention to him.
Our Miss Brooks: Miss Brooks does this a few times in the the theatricalseries finale, i.e. her confused expression upon meeting Mrs. Davis. However, her expressions were very much testament to her feelings rather than an attempt to break the fourth wall.
Past Lives: The first shot of the film, of Nora, Hae Sung and Arthur from the perspective of an off-screen couple observing them, pushes in on the three until it becomes a close-up on Nora; the shot ends with her looking directly at the camera. The film's writer-director Celine Song stated that this moment was designed so that Nora's look would simultaneously welcome and implicate the audience.
Later on, Davy Jones does this while smirking at the camera and quirking an eyebrow. He doesn't exactly have eyebrows, but he pulls it off.
In the Police Academy movies, Guttenberg's character would often do this — without actually looking at the camera. He'd just turn and stare disbelievingly in a vaguely camera-like direction.
At the end of Pretty in Pink, Butt-Monkey Duckie is so shocked on discovering a girl's interest in him that he looks right out the fourth wall.
During the Training Montage in Robin Hood: Men in Tights, the villagers are demonstrating their complete lack of skill while trying to draw arrows from their quivers. Robin just looks to the camera with a look of amused despair, then back to his pupils with a snort.
The Rocky Horror Picture Show: Frank N. Furter shoots looks at the audience on more than one occasion. One interpretation of this is that he's insane and always thinks he's on stage performing.
In Scooby-Doo: Monsters Unleashed, this is the Tar Monster's response to the Pterodactyl Ghost flying into him and getting stuck after the latter fails to steal the MacGuffin from Scooby.
While watching Lucy and the Diamonds perform, Maurice Gibb looks directly into the camera and smirks while lifting his eyebrows.
After FVB orders Mean Mr. Mustard to steal the instruments, he turns to the camera and gives an evil grin.
During the massive argument that breaks out at the climax of Blake Edwards' A Shot in the Dark, Clouseau vainly tries to restore order but winds up staring helplessly into the camera.
A chase sequence in the classic Burt Reynolds film Smokey and the Bandit sees Bandit outwit a police vehicle by quickly driving behind a building and turning off the lights, then slowly driving away when the policemen leaves. The Bandit stops to look back, then smiles to the camera before he roars off.
In Spaceballs, Commanderette Zircon calls Skroob on an unlisted wall, right above the urinal he's utilizing. They salute and Skroob briefly exposes himself to Zircon. In a blink-and-miss-it moment, Zircon looks directly at the audience and smirks before logging out.
In Star Trek VI: The Undiscovered Country, where you wouldn't expect it - the local aftermath from meeting with representatives of the Klingon Empire sees the crew nursing various hangovers, not thinking that was going to go down as a great chapter in diplomacy, and as they disperse to their respective quarters, Mr. Spock looks straight up at the camera and raises an eyebrow.
Attack of the Clones: When Anakin and Obi-Wan first meet Padmé at her apartment, Jar Jar gives a quick one with a grin, as if he's saying to the audience "Meesa still here!"
A New Hope Special Edition: At the end of the added scene where Han talks to Jabba outside the Millennium Falcon, Boba Fett turns and looks at the camera.
Return of the Jedi: While none of the major characters do it, one of the AT-STs does one just before it loses its balance on a bunch of logs as if to go "Oh, come on, really?". It then falls over and explodes.
Justified in Terminator 2: Judgment Day: When Sarah Connor fails to get out of the asylum due to good behavior, she attacks the doctor who doesn't believe she's actually changed. After she's restrained, the doctor looks at the screen (that is, the camera that they set up to film the interview) and makes an aside: "Model Citizen..."
While Nick Rivers is riding a motorcycle, he turns his head and winks at the camera.
Earlier on, after describing Nick describes their situation verbatim, Hillary says 'I know, it all sounds like some bad movie.' They both then look very slowly in the direction of the camera.
While the title character is flying through the air toward some enemy Mooks, he briefly turns his head and looks at the camera.
In the end credits. After Undercover Brother takes his car through a car wash and several female attendants are flirting with him, he turns his head and broadly winks at the camera.
In Up Pompeii, Lurcio gives one to the audience after reading the word "Venus" in Nausius' second ode to Flavia, believing that the upcoming rhyming word will be "penis".
In Weird Science, Wyatt gives the camera a glance when Chet says, "Next thing you know, you'll be wearin' a bra on your head."
In We're the Millers David gives one during Rose's stripping scene, with a big smile.
One odd moment in Puerto Rican film What Happened to Santiago has Santiago sitting idly on a bench when a shootout between a thief and some cops erupts around him: the thief actually stands right next to Santiago (and behind a statue) while exchanging gunfire. After the thief runs off Santiago looks at the camera with a "WTF?" look on his face.
Jessica Rabbit makes at least 3 of these. There's a subtle one during her singing number right before she sits on Eddie, then another after knocking out Roger with a frying pan and dumping him in the trunk of a car, and a very quick one as she's getting into Benny the Cab in Toontown.
Roger looks into the camera at the end of the film, right after Jessica tells him she'll bake him a carrot cake after they get home.
Wishmaster 2: Evil Never Dies. After taking several scenes to get a prison guard to doom himself with a wish, the Djinn finally succeeds and shoots a Psychotic Smirk at the audience.
that this moment was designed so that Nora's look would simultaneously welcome and implicate the audience.