A slug crawls into a tavern, gets up on the bar, and orders a beer. The
bartender says "Get lost. We don't serve slugs". More patrons begin to come
in and sit down at the bar, and the slug's generally getting in the way,
bothering the bartender and leaving a slime trail all over the bar. Finally
the bartender slips a coaster under the slug, takes him outside, and dumps
him in the bushes.

Three months later, the slug reappears on the bar and says, "Hey! What the
hell did you do THAT for???"