Deliberate mistake: All Minor Hockey Leagues in North America require players to wear visors with their helmets.
Tooth Fairy (2010)
1 deliberate mistake - chronological order
Starring: Dwayne Johnson, Ashley Judd, Julie Andrews, Seth MacFarlane, Stephen Merchant
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.