At the end of the movie, they come to take away the body of Big Baby Sweets, and it's night time. You can see the night sky behind the actors. However, after Sweets' makeup is wiped off, the camera pans back and you can clearly see the daytime sky behind them.
Ape Boy was actually played by Violent J (who also played Big Baby Sweets). Apparently, because Shaggy 2 Dope was supposed to do a wrestling move on the actor who played Ape Boy, they would have to have someone who was trained in wrestling to play the part. According to Violent J, it would have cost too much money to re-dub someone else's voice over his own in the Doughnut Shop scene, which is why Ape Boy sounds like Big Baby Sweets.