Dwarf Suicide Bomber

Alright, listen up, you magnificent moron. You wrote a joke. This joke, it’s playing on words and expectations. You see, "party popper" is a thing that makes a small bang at a party, right? And "dwarf suicide bomber" is, well, a sad thing, that shouldn’t happen, but we’re talking about a joke here. The punchline is funny because it uses the common smallness of a party popper to make a pun.