Factual error: In the final surfing scene, Cody and Z are surfing, presumably, off into the sunset. However, being on the north shore (given Z's remark a few moments before), that would mean the wave is rolling to the south which would put the sun toward the east not the west. (01:20:00)
Factual error: When Wilbur tosses Lewis onto the time machine, he should have broken or hit the glass covering the back half. And he is on all fours when the machine becomes visible, which shows he would have had his face hitting the driver seat, yet he scrambles back into the passenger seat without a problem, then is seen barely leaning forward to talk to Wilbur in the future.
Factual error: After Superman plows through a building with Doomsday, Doomsday flies into a power plant. He goes over the top and snaps the power cables and hits a green box, causing a few of the red towers to fall. But when Doomsday grabs Superman and takes off running through the power plant, the damage there is suddenly way more extensive than what would have been for just snapping cables and causing the towers to fall. (00:22:20)
Factual error: In the scene where the angry mob is attacking the Simpsons in the tree house, Grandpa Simpson is shown aiming a double-barrel shotgun, which he then pumps to ready it for firing. There's no such thing as a double-barrel pump-action shotgun. (00:36:20)
Factual error: When the Level 2 Sentry gun begins firing, you can see Shotgun shells falling out of it instead of the usual ammo casings. (00:00:40)
Factual error: Remy sniffs the messed-up soup and almost throws up. Rats can't retch.