Revealing mistake: When Damian knocks Lee Remick over the balcony with his tricycle, five big goldfish in a bowl get knocked over, too. But the fish don't move; they don't flap around like fish do out of water. They are obviously fake fish.
Revealing mistake: The protagonist figured out that the killer is following the "Shaggy Peter" nursery rhyme and explains it to his colleague. A close-up of the supposed killer follows, putting together an album with obituaries. The obituary to the left is an obvious fake; its bottom half begins with half a word mid-sentence, and it mentions a daughter-in-law; the actress Greta Vayan playing the victim - a prostitute - was in her early 30s. (00:07:50)