The owner got tired of the (w)hole business!
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
Do you want to grab a bite?
or
I said, "I can't make Tuesdays"
or
A porcupine with split ends
or
or