Continuity mistake: When Terri is at the party, her blonde wig changes shape and size many times.
Continuity mistake: In all of the aircraft scenes, almost every time they showed his aircraft, he has different types of weapons on it.
Continuity mistake: In the first act, two of the seven Hoosiers leave the team after Hackman takes over as coach. Shortly after, one of the players apologetically returns, bringing the total to six. The seventh member, "Buddy," is never shown returning, but halfway through the film you start seeing him again in the games.
Continuity mistake: When Johnny 5 nearly drives the snack wagon over the edge to where it is hanging, it appears to have miraculously moved right back from the edge, making it look like he never went nearly over in the first place.
Continuity mistake: The band-aid on Jill's doll disappears and reappears several times.
Continuity mistake: The Bird of Prey is the one captured by Kirk's crew in ST III That ship's bridge showed Klingon Cmdr Kruge in his elevated command chair with his helmsmen arrayed circularly below him, and nothing else. ST IV has this same ship, however the bridge now resembles The Enterprise layout with Kirk's command chair behind Sulu and Chekov at their rectangular helm, with Spock, Scotty and Uhura at their usual positions.
Continuity mistake: The rear view mirror disappears when Jeanie is speeding home.
Continuity mistake: In the Madison Square Garden fight scene between MacLeod and Fasil, Fasil's shades fall off after he rolls over a car, and the shot of them on the ground shows him running away in the reflection. McCloud stands over them looking around...and a few seconds later Fasil strikes a junction box, with his shades miraculously back on his face.
Continuity mistake: When Walter is watching the fire go through the electrical system in the walls of the kitchen, watch the blender. One shot shows thick, chunky, white/orange stuff flowing out over the edge of the counter. The very next shot shows the blender toppled, but very clean. There is no trace of the chunky stuff in the blender or on the counter.
Continuity mistake: When the Marines first enter the reactor room, the "Mission Time" readout on the shoulder mounted cameras jumps backwards and forwards in time with every cut. (00:54:10)
Continuity mistake: At the Policeperson's Dance, Copeland spills punch over the Commissioner's wife's white dress. As the camera view switches, her dress is already stained before she is splashed.
Continuity mistake: In the battle scene at autobot city, Megatron orders Soundwave to jam the transmission that Blaster is sending to Optimus Prime. When Soundwave ejects Rumble, Frenzy, Ravage & Ratbat we see them flying through the air transforming simultaneously and and both Rumble & Frenzy are coloured the same (red & black) when Rumble is supposed to be purple. (00:15:08)