10. Captain Hook's Clothes Keep Teleporting - Peter Pan
Throughout Peter Pan, Captain Hook has a habit of losing an item of clothing only for it to reappear on his person without explanation. If this happened once, it would be an honest mistake. However, it happens in nearly every scene Hook appears in! When the crocodile bites off his left boot, Hook's right boot is missing in the next shot. Seconds later, the pirate captain's boots suddenly reappear on his legs.
While the dastardly villain fights Peter Pan in the scene with Tiger Lily, his sword falls off a ledge. In the following shot, Hook's sword has magically returned to his scabbard. When Peter Pan slices off the feather on his nemesis' hat, it appears undamaged a moment later.
However, there is one mistake that trumps all the ones aforementioned. Despite the fact the Pan's arch-enemy is best-known for his hook, the animators forget what arm his hook is on... TWICE! When he is in the cabin with Tinkerbell, Hook drags Smee by his hook on his right arm instead of his left. The hook switches to his right arm again in the shot when Hook tries to jump on Smee's boat to get away from the crocodile.