When you are eating a watermelon.
or
Because he want to wake up some day as America's First Dictator.
or
Two. One to take notes while the other screws it into the faucet.
or
10. One to hold the bulb and nine to rotate the ladder.
or
He wanted to win the no-bell prize!
or
Two, one to call the electrician, and one to mix the drinks.
or