They stamp their feet.
or
Fifty — one to screw in the bulb and 49 to guard him/her.
or
It's called "Trump It or Dump It".
or
Because pepper makes them sneeze
or
Because they don't fit on a ironing board
or
Two. One to take out the bulb and drop it, and the other to try and sell it before it crashes (knowing that it's already burned out).
or