Anti-humor and anti-jokes (also known as unjokes) are a kind of humor based on the surprise factor of absence of an expected joke or of a punch line in a narration which is set up as a joke.
Comedians known for their anti-humor are Norm Macdonald, Ted Chippington, Neil Hamburger, Corey Mystyshyn, and Bill Bailey.
Two atoms walk down the street, Silver and Iron. Suddenly, Iron screams and keels over on the floor, coughing up blood and a strange little ball that vanishes in an instant. Silver asks him what happened.
"I...I think I just lost an Electron."
Silver is taken aback. "Are you sure?"
Iron turns to him slowly. His eyes are pulsing red and veins are showing all along his shiny face. Clouds roll in. Darkness falls, thunder cracks in the distance, the light creating a sharp profile of Iron before he falls back into a darkness pierced only by his gleaming eyes. Finally, he opens his mouth, and slowly he wraps his word around every syllable, savouring it. He says... "Of course I'm fucking sure!"
Two atoms walking down the street.
One says "I've lost an electron."
Other says "Are you sure?"
First says "I'm positive."