Use a sea saw.
or
Because he has such yuuuuge fans!
or
Three:
One to write the light bulb removal program,
one to write the light bulb insertion program, and
one to act as a light bulb administrator to make sure nobody else tries to change the light bulb at the same time.
or
100: One to do it and ninety-nine to say "I could've done that."
or
The barman says "I'll serve you, but don't start anything"
or