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).
Continuity mistake: When Annie points to the bridge and says "There it is! Fourth street!" her arm is lifted and pointing to the window. The scene then cuts to Kevin, and you can see in the background that Annie's arm has instantly gone down between cuts.
Continuity mistake: After Sarah and Ryan have their awkward moment in the back of the car, it cuts to Max and then Kevin. Sarah is in the background of both shots. In the shot of Max, we see her brushing her hair with her hand and then lowering her hand into her lap. Then, when it cuts to Kevin, suddenly Sarah is brushing her hair with her hand again, and puts it back down a second time. The cuts are instant, so there's no time for her to have lifted her hand back up between edits.
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.
Continuity mistake: When Kevin and Michelle are searching the bedroom and Kevin starts grilling Michelle on the "celebrity" she slept with, Michelle goes from facing the bedside table to facing Kevin instantly between cuts.
Continuity mistake: When Donald Anderton is giving water to his fighter and calls the next fighter in, the amount and pattern of the blood on his fighter's chest changes at least twice between shots. (First his chest is covered in blood... then almost completely clean... then partially covered in blood).
Continuity mistake: In the car, Ryan says the kidnapper sounds like a "monster" and Sarah explains that he's using a voice-change. During this exchange, Sarah goes from looking forward, to looking sideways at Ryan, then back to looking forward instantly between cuts.
Continuity mistake: The T-shirt max uses to clean the blood of Bastian is COMPLETELY covered in blood... until he unfolds it and sees the picture on it, at which point suddenly about 60% of the blood suddenly vanishes from it. It's still bloody... but nowhere NEAR as blood as it was a few seconds prior. (They obviously switched out the shirts between takes).
Continuity mistake: When Max is trying to clean the blood of Bastian the dog with the T-shirt, the amount of blood on Bastian's fur changes slightly depending on the angle. In the profile angle, there's slightly more blood, and in the over-the-shoulder angle, there's slightly less blood. (Most likely the angles are from different takes where they re-applied the fake blood to the dog and it didn't quite match 100%).
Continuity mistake: When Max first reaches down to Bastian the dog in the office, Bastian has his face pressed to the ground and is licking the blood stain. The scene cuts to a profile angle, and suddenly, Bastian's head is no longer pressed to the ground, and is instead lifted almost all the way up.
Continuity mistake: When Max spits out the squeaky toy at Annie, she goes from facing downwards to facing up at Max between cuts.
Audio problem: When Max is biting down on the squeaky toy during the bullet extraction scene, the way the toy squeaks doesn't really "match" with his biting. Those types of toys wouldn't let out comically long squeaks like that from a single bite down. (Obviously it was exaggerated for comedic effect).
Continuity mistake: When Annie is showing Max what she got at the convenience store, at one point she pulls a pocket-knife out of the bag and puts it in her hand. The shot cuts to a different angle, and the pocket knife vanishes.
Continuity mistake: At the end of the chase, Annie and Max are in the car. Annie is driving and Max is in the passenger seat because he was shot. Annie screams "I hate game night!" and the scene cuts to an exterior wideshot of the car driving down the road. If you look closely, you can see in the wideshot that only one person is in the car - a man who is driving. Even though in the previous shot Annie was driving and both she and Max were in the car.
Continuity mistake: When Max and Annie find Brooks in the bar, and Brooks tries to explain that he's a smuggler, pay attention. Brook goes from facing Max to facing Annie instantly between cuts at one point.
Continuity mistake: When Annie is dancing around at the bar, the way the scene is tightly cut makes some minor mistakes with where she is in the room. For example, at one point, she is in front of one kidnapper, but then is immediately in front of the next kidnapper between shots. There's a few other little small moments like this throughout the scene. It's hard to notice because of the tight framing, but it's there.
Continuity mistake: When Ryan and Sarah are looking at the clue card that says "Look in Your Jacket Pocket," pay close attention. In the closeup of the card, there's some stuff right behind it, only inches away. Then it cuts to a wideshot, and you can see that there's nothing right behind it. The only things on the table are about a foot away.
Continuity mistake: When Ron, the actor playing the "FBI Agent," is explaining what happened, watch his hands. They go from down to up between shots at one point.
Continuity mistake: When Max notices Brooks through the doorway at the bar, Annie is sipping Max's drink then starts to set it down. The camera cuts to a different angle, and suddenly she is sipping his drink again and puts it down a second time.
Continuity mistake: When Annie and Max are chatting at the bar, watch Annie's arms. (She is leaning against her hand.) In the shots facing her, her red sweater is sticking out of the sleeve of her jacket. In the shots facing away, her red sweater is NOT sticking out of the sleeve of her jacket.