Alice makes a humorous observation, and waits for Bob to laugh. Instead, Bob offers a simple explanation. If Alice is present, she immediately realizes that the joke is ruined. She may be crestfallen, or angry, or simply say "Huh, I never thought of that." If not (for example, if Bob is watching Alice on TV) his friends may laugh harder at his response than the initial joke. Overlaps with Rhetorical Question Blunder if the joke was phrased as a question. Alice can do this to herself, in a strange form of Oh, Wait!, but the setup for that isn't usually a joke.