This happened to Matthew a little time ago. He was approached by a little kid accompanied by his father to enquire about a game.
Little kid: Hello, would you happen to have the game 'Stimulator' for PC?
Matthew: Erm... ~_~'
Little kid's father: Shhhh, what are you saying, not 'Stimulator'... 'Flight Stimulator' for PC.
Matthew: (trying to hold in the laughter) I'm sorry sir, we're out of 'Stimulators' right now.