Because he hung around for too long.
Six-1 to change the bulb and 5 to sing about how much they miss the old one.
Pupil: Cannot miss Teacher: and what is don't short for Pupil: Doughnut !
In the punch line
Becuase he hangs around with pooh! Had to share my 5 year olds joke..
Me: The bus mostly Interviewer: I mean what motivates you to get out of bed in the morning M: missing the bus
A stand up driver.
Katabatic
Bat you'll never guess!