Too much work.
5,6,7,8!
1001 1 to offer up the bulb and 1000 to scream 'Get in the hole'
Cashearing! (Joke I made up last night at work, so be gentle with me)
Because if his punch line doesn't work, you still get a kick out of it.
He liked to chop and change!
You would too if you had to change in the middle of the street!
The week force.
Because he was a physicist.