He who makes a mistake in an elevator is wrong on many levels.
It lifts their spirits.
It was feeling down
Pupil: I get up early!
Interviewee: "I never learn from my mistakes" Interviewer: "Oh, why's that " Interviewee: "I never make any"
Because they're funny on many levels.
Because they work on so many levels
Macaroni and Qi.
Off-by-one error.