TedStixon

Revealing mistake: When Max and Annie are driving the car towards the Bulgarian's plane, there are a few exterior shot of the car, and you can blatantly tell that "Annie" is a stunt performer in a bad wig. Her head and especially hair look MASSIVE in these shots, compared to how small her head and hair usually are. (It's especially noticeable in the shot that's following the car from behind).

TedStixon

Revealing mistake: Throughout the single shot chase (which was actually multiple takes edited together), during a few moments, you can subtly see where the different takes were stitched together. Ex. When Michelle first gets the egg and runs through the doorway, you can subtly see the white door-frame to the left of her "warp/shrink" a little bit for about a half-second. There is also a few moments where the shots don't quite transition perfectly and you'll get a light "wobble." It's VERY subtle but noticeable.

TedStixon

Revealing mistake: When Brooks throws the kidnapper against the poster case and then punches him, it's painfully obvious his punch didn't connect. His fist is a good 6-8" away from the kidnapper's face. But they still play a punching sound effect and act like he got punched.

TedStixon

Revealing mistake: When Ed falls on his belly and dies of a heart-attack at the end of the film, if you look closely, you can see the actor is still breathing a few times. He's trying to hold his breath, but every so often, you can see his back subtly raise and lower as he slowly takes a breath in and out.

TedStixon

Welcome To The Hellmouth (1) - S1-E1

Revealing mistake: When Buffy sneaks into the locker room and checks out the dead body, you can see part of the outline around the prosthetic vampire bite on his neck (it isn't quite blended in properly), revealing it's an appliance.

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Revealing mistake: When Millie (in the Butcher's body) knocks out the Butcher (in Millie's body) with the mini-golf club, you can see the Butcher react to being hit a split-second before he/she's actually hit. Slow motion helps, but is not required.

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Revealing mistake: When Millie jumps on her shop teacher's back, the teacher switches from the actor to a stunt double as they begin to tumble about. Noticeably, his hair suddenly gets much darker and has less gray in it. You can also get brief glimpses of his face, and it's obviously not the actor.

TedStixon

Revealing mistake: When Gregory throws Tree through the window during the final fight, as Tree lands, you can see the outline of a stunt-pad on her thigh beneath her pants. You can also tell it's a stunt-woman, as her body is slightly stockier than Tree normally is.

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Revealing mistake: When Tree accidentally runs off the hospital roof, you can get a quick but pretty clear look at the stunt-woman's face as she falls, right before she hits the ground. The stunt-woman's body is also very slightly stockier than Tree's actress Jessica Rothe.

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Revealing mistake: When Tree kills herself by throwing herself out of a plane, in the shot where she lands in front of Carter and Danielle, it's very blatantly obvious she was filmed on a greenscreen and comped in. The lighting on Tree doesn't quite match the lighting of the scene, and there are very obvious and unnatural hard lines around her hair where the background was rotoscoped/keyed out.

TedStixon

Revealing mistake: When Lin flies down and kicks the evil general into the gears, it's painfully obvious that the actress is on a wire. Her body unnaturally sort of floats as she's performing the kick, then after she's made contact with him, you see her unnaturally move backwards and land on the ground while clutching something invisible (presumably the wire that was painted out) in her hand. When she lands on the ground, it's also clear from her feet not touching the ground "properly" that she's being suspended.

TedStixon

Revealing mistake: During the climax, one of the weasels says "Toon Town's right on the other side of the wall, boss!" If you look, you can see a brick moving completely by itself behind him. It literally just pushes out of the hole in the wall as though it's being pushed from the other side. It seems like the other weasel was supposed to be animated pulling it out, and they somehow forgot to animate that part. (He does reach over and grab it for a split second... but then immediately lets go for some reason).

TedStixon

Revealing mistake: When the Emperor attacks the village in the beginning after the assassination attempt, watch closely. During the fourth shot, a soldier hits a villager over the head with something and there's an audible sound... but you can see plain as day that the soldier was nowhere close to actually hitting the villager. He stops a good 3-4" away from actually hitting his head.

TedStixon

Revealing mistake: When the evil general is kicked into the gears and crushed, the second camera angle gives away the fact that the gears are actually nowhere near touching at all, and thus, the general is not actually being crushed. Obviously they wouldn't actually be touching because they wouldn't want to hurt the actor... but they could have picked a better camera angle that didn't give it away.

TedStixon

Revealing mistake: When the Yeti arrive, the second soldier that is attacked is picked up and thrown into a doorway. When he lands, you can very briefly see the snow for a few feet on either side of him "pop up" in the wide shot, revealing he landed on a pad. The camera cuts to a different, closer angle after about 5 or 6 frames, so it can be hard to catch the first time, but if you know where to look, it's very obvious. (Slow motion can help, but is not required).

TedStixon

Revealing mistake: When Rick catches himself in the neck with the fish-hook, if you look closely when Rick pulls on it, it's pretty obvious that it's a prosthetic. Not only is the skin around the hook a lighter shade than the rest of his neck, but the way it stretches and wrinkles is completely unrealistic, giving it away as a small sheet of latex.

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Revealing mistake: In the beginning of the film, watch closely when Sindel says the infamous line "Too bad YOU... will die!" When Sindel says the words "will die," two of her teeth suddenly turn gray and become blurred. (One tooth on top and one on the bottom.) The best I can figure is that it was some sort-of slip up with the special effects rendering, since the background has a CGI sky replacement effect. It can be hard to notice at first, but if you know where to look, it's pretty obvious.

TedStixon

Revealing mistake: When the car Howard Saint is tied to explodes, watch Howard's body - it's clear that he's been replaced with a hilariously obvious dummy. It's especially comical if you look at his legs, because it appears that the dummy doesn't even have legs inside of its pants given how they "wobble."

TedStixon

Revealing mistake: When Frank kills Howard Saint at the end of the film, pay close attention when the cars start to explode. About a second-and-a-half after the first explosion, the camera cuts to a high-angle shot looking down at the cars exploding. Pay attention and you can see a lot of errors. For example, there are two cars (one red and one blue) on the right side of the screen that are teeny-tiny models and aren't properly blended into the background with blurry edges around them. Additionally, the three cars on the bottom left of the screen also have noticeable black lines around them. (Likely from a poor compositing job.) It appears the shot was created with different miniatures layered over a background plate, and the various miniatures weren't properly comped into the shot.

TedStixon

Revealing mistake: When Liu transforms into a dragon during the final battle, the wideshot where he actually transforms while being held by Kahn is completely laughable. The digital dragon clips through portions of the live-action background (particularly around Khan's arm that was hanging onto Liu) and the lighting on the dragon doesn't match with the lightning flashes in the background.

TedStixon