That's not funny.
Only one. But they have to sit in the dark room for a year, first, to make sure that the lightbulb is out.
Two. Obviously.
Two. One to arrest the room for being black, and the other to arrest the bulb for being broke.
All of them actually . Two to hold the ladder and one to change the lightbulb .
A shopping cart will, on occasion, exhibit a mind of it's own
