When pizza boy is attacked his bicycle is laying on its left side with bent front wheel. Later it is shown laying on its right side, splattered with blood and small body parts. The front wheel is now unbent.
The goof item below may give away important plot points.
When the flying monkey is shot in mid air, the shooter's pistol slide locks in the rear position indicating it is out of ammunition. When another character kicks his gun hand to the side you hear a gunshot.