Continuity mistake: When Frances goes to the park to see Larry, he is playing basketball. After Frances stops him Larry is holding the basketball on his side, when the shot is behind him, and when it shows him from the front he is holding the basketball in front of him.
Continuity mistake: After Larry's experiment in the garage the amount of spoiled milk on Larry's goggles changes.
Other mistake: When the Boogeyman gets hit with the plastic eye the Boogeyman flips over when the Boogeyman should have just fallen.