All examples found in cinematic releases are here!
In Anti Trust Milo righteously exclaims "In the real world, when you kill people, they die—for real!" He's saying it to bring home how far removed the Big Bad really is from reality and how little he respects human life, but it's pretty silly out of context.
Asterix: What's that? Getafix: It's the end of his beard! Obelix: Then he must be at the other end! Asterix: You figured that out by yourself?
In Mission Impossible: Ghost Protocol, when Ethan Hunt is rappelling down the side of the Burj Khalifa with a fire hose, the hose turns out to be slightly shorter than needed. One of the characters yells at Ethan "Your line's not long enough!" to which Ethan replies very sarcastically "NO SHIT!"
Ric Olié in Star Wars Episode I: The Phantom Menace is notorious for lines like "Enemy fighters straight ahead!" or "Coruscant... The entire planet is one big city."
The very first scene with Qui-Gon and Obi-Wan has battle droids arrive and turn on their force fields. A second later, Obi-Wan says, "They have shield generators!"
C-3PO demonstrates his usefulness:
[ground shakes violently] C-3PO: Sir, it's quite possible this asteroid is not entirely stable. Han: "Not entirely stable"? Well, I'm glad you're here to tell us these things! Chewie, take the Professor into the back and plug him into the hyperdrive.
Admiral Akbar's "It's a trap!"
In Star Wars Episode II: Attack of the Clones, Obi-Wan after the would-be assassin of Padme is killed by what is very obviously a toxic dart: "A toxic dart!"
Legolas in The Lord of the Rings always yells what happens. The most commonly used being that if an orc attacks, he yells "Orcs!"
Although the one he's famous for isn't really an example, because before he said "They're taking the hobbits to Isengard!" there was legitimate uncertainty over where they would take the hobbits.
The Ten Commandments is absolutely loaded with this, to the point that it often seems like they're reading the scene descriptions as well as the dialogue.
One such example:
General: He opens the water before them, and he bars our way with fire!
Boy: He raises his hand and he opens the sea!
Old Man: God opens the sea with a blast of his nostrils!
On two occasions in Donnie Brasco. First when Lefty asks if there's good money in 'it', Donnie takes a few moments to ask "What, jewels?". And then when Donnie notes that the knob of the air conditioner isn't there. Lefty replies to both sarcastically "Thank you."
Parodied in Austin Powers with Basil Exposition, who as well as the more useful kind of filling-in, on occasion displayed a tendency to state the blindingly obvious as well ("Thanks, Basil."). In particular, a deleted scene from the first movie has him helpfully pop up at the end to inform Austin and Vanessa that they've survived the destruction of Dr. Evil's secret base and have found themselves in a raft for some reason.
In ¡Three Amigos!, the main characters are trying to find the Singing Bush. They come to a bush that is singing. They repeatedly ask if it's the Singing Bush, but it doesn't reply because it's too busy singing. Finally, one of them confidently proclaims "I think this is the Singing Bush."
While Indiana Jones and his father are being pursued by angry Nazis:
Henry Jones Sr: These people are trying to kill us!
Henry Jones Jr: I know, Dad!!!
At the end of the movie, a collection of grails are found along with an immortal knight who explains that only one is the Holy Grail and that "for as the true Grail will bring you life, the false grail will take it from you". After drinking from one of the grails, Donovan rapidly ages, becoming a skeleton in the span of about thirty seconds. Just in case Indy and Elsa didn't get the idea, the knight says "he chose... poorly", demonstrating that Tropes Are Not Bad.
Mr. Pizzacoli: They said "the Photon Accelerator Annihilation Beam," you fool! Chester: Hurry, activate it, dude! [a small panel on the Transfunctioner reads "Photon Accelerator Annihilation Beam"] Chester: I think that's it, dude. Jesse: Thank you, Captain Obvious!
The cop in the passenger seat of the paddy wagon in The Dark Knight has this role. Obviously justified, since the audience would have noticed if Gordon started talking.
In fact, Miagi does this all the time, answering questions with simple and obvious answers when his student is expecting complicated ones. The whole point behind it is probably that the secret to success is not taking things too seriously.
X-Men has Storm's much maligned observation: "Do you know what happens to a toad when it's hit by lightning? The same thing that happens to everything else." This was supposed to be the payoff to a Running Gag where Toad constantly brags about things a toad can do. For some reason, it was left in as an Orphaned Punchline.
Neo enters the Keymaker's coop, and introduces himself. The other, while crafting a key at that specific moment and while literally being drowned in an ocean of finished keys, simply responds with "I am the Keymaker."
"Now there's more than one of him?" "A lot more" "How is that possible?" "Somehow he's found a way to copy himself." Of course, this does rule out something else copying him and there having been multiple copies of him to begin with.
"Is that good for us or bad for us?" "Well, it looks like every floor is wired with explosives." "Bad for us."
In Help!!, Ringo is trapped in a basement. A tiger comes in, and its presence is noticed by a caption reading "A Tiger".
In the Disney animated version of Peter Pan, when Wendy walks the plank, Pan rescues Wendy before she hits the water, so the pirates just see her fall out of their sight and then hear nothing. A crewman then informs everyone that they just heard no splash, which seems to annoy Captain Hook, as he then creates a splash by throwing said crewman overboard.
Frightened guard: "He's got a sword!" Razoul "You idiots! We've all got swords!"
In the film adaptation of Red Sonja, the titular character is weeping over her sister, who's just died. Arnold leans down, touches her lightly on the shoulder and says, "She's dead." I suppose it's meant to buck her up, but dear God, show some sensitivity man.
From Ghostbusters: Ray asks Peter where a flight of stairs goes, since Peter's been there before. Never one to admit ignorance, he simply states, "They go up."
One of many lampshadings in Galaxy Quest where Gwen complains that her only role in the show, apart from being Fanservice, was to repeat what the computer had just said out loud.
Lampshaded as the heroine is being held hostage by a bad guy who is pointing his gun at Frank.
Jane: He's got a gun.
Frank: I know.
Taken from a running gag on Police Squad!, offers of cigarettes are mistakenly interpreted as statements of fact.
Jane: Yes, it is.
Sheriff Obvious in the 2010 remake of The Crazies, after learning that an unidentified plane has crashed in their drinking water, townsfolk have started acting insane and murderous, and that they have no phone connections or internet access, has this brilliant gem to say:
David: We're in trouble.
Which is even more amusing when you consider he's actually the Only Sane Man in town.
Much of the dialogue in the Miramax version of The Thief and the Cobbler is this, mainly because it was half-heartedly thrown in for the sole purpose of Lull Destruction. For example, we know Tack's in love with the princess because he makes her face out of thread in a very effective scene. Yet somebody decided he also needed to sing a horrible Award Bait Song song about it!
From Vin Diesel film The Pacifier: "You know why you quit, Seth? Because you're a quitter. And everyone knows that quitters quit."
After the thieves in Reservoir Dogs get away from a robbery that turns into a police shootout, they're having trouble locating one of their own. Mr. Blonde has a succinct analysis of the situation: "Either he's alive or he's dead, or the cops got him, or they don't." Mr. White is quick to point out what an obvious observation this is.
Attempting to list all the examples from the film would keep us here all night, but mention has to go to Aang using his Captain Obvious powers to save an entire village by reminding the Earth Benders they are in fact capable of Earth Bending.
The Mask: Seems to be a defining point of Detective Doyle's character, to the frustration of Lt. Kellaway.
A group of police fire without success at The Mask.
Detective Doyle: I missed.
Lt. Kelleway: Aw, we all missed!
Black Dynamite: "These children are orphans… and orphans don’t have parents."
Dungeons & Dragons: "Typical of you thieves. Always taking things that don't belong to you."
Inspector Clay is dead... murdered. And somebody is responsible!
Visits? Well, that would indicate visitors!
Future events such as these will affect you in the future.
The Giant Spider Invasion features a brief exchange between a woman and her cheating husband, who pretends to go into town to listen to a preacher. Their conversation mirrors one had by Calvin Coolidge (see in the Real Life Folder, below).
In Star Trek II: The Wrath of Khan, when the Enterprise is trying to contact Regula One, Spock has this insightful comment, "There are two possibilities. They are unable to respond. They are unwilling to respond."
In Star Trek: Nemesis, Data had his Captain Obvious moments too, as even the dead-serious TNG crew couldn't help but notice sometimes...
Data:[picking up a robotic arm] It appears to be a robotic arm. Worf:Very astute.
In most of his incarnations, Spock plays the Captain Obvious role. This is lampshaded in the 2009 Star Trek film.
Spock: [on intercom] Dr Puri, report. McCoy: It's McCoy. Dr. Puri was on Deck 6. He's dead. Spock: Then you have just inherited his responsibility as Chief Medical Officer. [McCoy looks at a burning medical room full of casualties from the attack] McCoy: Yeah, tell me something I don't know!
Vicki Vale in Batman. "Bats", she points out, upon seeing the animals in the Batcave, "His parents were murdered in that alley. That's why he went there" while checking Bruce Wayne's newspaper files motivated by having seen him going to the alley, and then when she sees Joker's Smylex gas flowing out of a balloon, she comments "Smylex gas". In the first and third example, the referred items are in plain sight not only to her but to the audience as well.
Milo (exasperated): Well, do you have any advice?!
Vinny: Yeah - Don't get shot.
In Shakespeare in Love, an exasperated lord unmasks one of Shakespeare's actors as a girl rather than a boy playing a girl: "That woman is...a WOMAN!"
In Bruce Almighty, we're treated to this from the title character: "It's a funny thing about pleasure, it can be quite pleasurable!" Partially justified though in that he was simply trying to say "pleasure" as much as possible.
Roland Emmerich's version of Godzilla features a scene where the titular monster is lured to an ambush with truckloads of fish to eat. Matthew Broderick gives us the bizarre statement: "That's a lot of fish".