Two. One to screw it almost all the way in and one to give it a surprising twist at the end.
100: One to do it and ninety-nine to say "I could've done that."
Just two, but more can join in if there's room in the lightbulb.
Only one but he has to have a nurse to tell him which end to screw in.
One, but the light bulb has to *want* to be screwed in.
A howler monkey.
You'll eventually end up with enough bricks to build a free garage.
Two - One to put it most of the way in, and one to give it an interesting twist at the end.
