"Do that and you'll wind up with the universe tiled with paperclips" cracks me up. Even hearing it out of context, its overly familiar, but to a bystander its completely nonsensical. What makes it even better, there is no jargon or uncommon vocabulary that would make someone assume they misheard you, an outsider overhearing this would be forced into a state of complete bafflement. Kind of reminds me that old Lewis Black stand-up about overhearing a girl say "If it weren't for my horse, I wouldn't have spent that year in college."