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
Just in case he got a hole in one!
or
He wanted to win the no-bell prize!
or
He made sure his pools were clean and his lawns were mowed.
or
Because he was under cover.
or
Bozo The Clown has real hair on his head.
or