A man opens a door after the bell rang. Outside is a snail, asking if they can use the bathroom. Annoyed, the man picks up the snail and throws it back to the street. A few weeks later, it rings again - when the man opens the door, the snail asks "what the hell was that just now?"

... That's German humor for you

>German humor

To be fair, the joke scans better in german, where "snail" is something you call someone who is being slow, and the Snail will often appear in jokes as the archetypal "slow" character, like the clever fox or the wise owl or the dumb blonde.

Almost the same in Polish. But the beginning was different - a man was talking up the staircase when he noticed a snail on the stair railing and flicked it so that it fell down 3 storeys"