An acquaintance told me this funny story: one Halloween, he decided to dress up as a werewolf. His costume and makeup were exceptionally good; had he not opened his mouth (which is an impossibility), he said that no one would have recognized him. He even went so far as to use Elmer's glue to glue fake hair to his arms and legs to complete the costume.
Apparently he had a lot to drink at the party, and when he went home, instead of just washing the hair/glue combo off with warm water, he tried to shave the fake hair off. At least that's what he and his wife were able to discern the following morning when they say the patches of fake fur and real arm hair shaved off.