Oh, man. When I was in sixth grade, we had some lady come into our class to talk to us about ... something. I don't even know what. I really don't think it was about linguistics in any way, so I have no idea wtf she was doing giving us this puzzle, but she did. She wrote it on the board and asked us how to pronounce it and I just looked at it for about thirty seconds and said, "Fish." Some part of my brain insists that I'd heard it before, but I have no memory of it. But I really really must have. I'm no idiot, but I'm not that smart.