Zero. Homeless people don't screw in light bulbs they screw in cardboard boxes.
Find out next time, on Dragonball Z!
A video game so realistic, when you screw up you have to play in a wheelchair.
Two, but how do they get in there?
3: One holds the light bulb, and the other two spin the Chair.
He wears the cardboard box on his boots.
Body centered cubic
A Pillow Fight
Because they crack themselves up!