Visible crew/equipment: When Rock is learning to fly, the top of the cyclorama wall is visible and the top of his flying rig harness is very visible with attempts to blur by post production on only some parts.
Other mistake: In a hockey game, Derek Thompson slams an opposing player into the wall and knocks out a tooth. Inexplicably, the tooth shoots straight up into the air and there is absolutely no blood on the tooth or around the player's mouth.
Derek Thompson: Does this tutu make my butt look big?
Lily: Yes.
Trivia: When the goalie is scared away by Billy Crystal during the end credits, he yells the Wilhelm scream.
Answer: It was all Black Market merchandise. Usually not of any good use; total rip-off.