Corrected entry: How could Arnie get from the top of the tree, to the water tower in such a short period of time?
Corrected entry: Arnie stays in the bathtub all night with out being noticed, which would be impossible because at least SOMEONE had to go to the bathroom in the middle of the night and they would've noticed him.
Corrected entry: When Gilbert is telling about the family and Endora at the beginning of the movie, he says that his father hung himself 17 years earlier. Yet, just seconds earlier he says he has a sister that has just turned 15. How did he father a child born two years after his death? There's no implication that she's a half-sister or adopted. (00:04:50)
Corrected entry: In the scene after Arnie has just climbed down the watertower for the first time and Gilbert is standing next to Arnie as they talk to the police. Arnie's hand is up near his face, then in the next shot it is down, then up again in the next.