What’s red and smells like blue paint? Red paint.
How do you make a plumber sad? Kill his wife and family.
Anti-jokes are some of the best jokes ever, because the endings are completely unexpected. When the setup of a joke is presented, we try to think of a clever response. Anti-jokes flip the joke on its head by concluding with a logical response.
For more good anti-jokes, check out Anti-Joke Cat.