Deliberate mistake: All Minor Hockey Leagues in North America require players to wear visors with their helmets.
Factual error: Hockey player Derek Thompson is nicknamed "Tooth Fairy" because he often knocks out the teeth of opposing players. His car license plate reads #1 TOOTH. In Michigan, where the movie takes place, the symbol # is not available for use on a license plate.
Derek Thompson: I'm the Tooth Fairy.
Randy: Thought you said you were a vampire. You got some inconsistent mythology.
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.