Revealing mistake: When Gilbert finds Arnie in the bath and takes him out, you can see a towel around Arnie's waist.
Revealing mistake: Charlie is hanging off the ledge of the hotel when Rose chops the axe in between his fingers - if you look closely at his hand it clearly looks like rubber.
Revealing mistake: When they leave their home to go to Beverly Hills and Granny is tied to her rocking chair on the top of the car, right before she hits the tree and comes off the car, you can see she isn't a real person. It's a dummy. (00:09:06)
Revealing mistake: When Lloyd Bridges is getting shot up during the dance scene, you can tell that it is a stand-in with a bad wig.
Revealing mistake: When they first arrive at camp and Joel goes to use his inhalers, the mouthpiece is actually in the storage position rather than the actuation position. The puff sound must have been added in later because the inhaler cannot be activated when it is put together that way. (00:22:20)
Revealing mistake: In the scene where Max is trying to find the source of the bad smell in his car, a shot from behind shows a view out the windshield. The column shifter is in Park even though Max is driving.
Revealing mistake: You can see the shadow of a camera and a microphone on Michael Biehn or Nicolas Cage back when they are fighting.
Revealing mistake: When Henry Mancini hands his conductor's baton over to the animated Pink Panther in the title sequence, he pushes it straight through the Panther's hand.
Revealing mistake: Right before Alex and Tommy are about to leave for their date, Walter is playing Tetris. When he puts down the control to come talk to them in the kitchen, the game keeps playing and you can see the pieces moving and turning.
Revealing mistake: When Darian is swinging the pole at Nick near the stairs during the climax, she is so cleanly replaced by a stunt double in two zoomed out shots. The double's face looks absolutely NOTHING like Alicia Silverstone.
Revealing mistake: When Emilio is breaking into the cookie factory, he finds a key under a welcome mat. He then opens the door before fully unlocking it with the key.
Revealing mistake: At the pool party, when Ike loses his temper and knocks Tina to the floor, you hear her screaming as he lands 3 punches. When he raises his fists, there's no blood on his fingers. Despite after he drags her into the bedroom, her nose is covered in blood.
Revealing mistake: The Turtles are preparing their time travel. Splinter tells them "The scepter will be in the temple, which means..." Pay close attention here, because now the rest of the sentence is obtained dubbing the line over a rewind of the previous footage. (00:21:50)
Revealing mistake: When Michelle Yeoh is about to hit the basket on the fire truck you can see her safety wire.
Revealing mistake: When Joe drives Camille on his bike, for a brief moment if you look closely a stuntman is driving for him.
Revealing mistake: During the tournament we see one fighter, a woman in pink spandex, fight Catya Sassoon twice. It's obvious due to the fact that Catya's wearing different clothes during each match.
Revealing mistake: Toward the end of the movie when Van Damme is on the motorcycle watch the pull back shots. You can see the stuntman in place of Van Damme. In addition, the stuntman is clean shaven in some shots where Van Damme looks like his beard is growing in. It's very noticeable, especially when he goes down the mountain. You can even see the ramp set up as he first goes down.