Wall Painting With Babies

How many babies does it take to paint a wall?

Depends how hard you throw them.

Explanation

This is a dark joke that plays on the listener's expectations. The setup suggests a standard 'how many does it take' scenario, but the punchline introduces a violent twist involving throwing babies to paint the wall. The humor comes from the shocking and absurd image and the unexpected shift from a benign setup to a morbid conclusion. The fact that babies are involved makes the joke more shocking and funny to some.