Five. One to change the bulb and eleven to say they could do it faster.
or
As many as possible, and don't *ask* what they do with the old bulb.
or
The owner got tired of the (w)hole business!
or
It ran out of juice!
or
Three. One to climb the ladder while the second kicks the ladder out from under her. And the third to say, "I knew that was too high for you dear."
or