None. The light bulb shall never burn out. (OK. It's more cathartic than funny...)
Because walking wouldn't burn enough calories.
Ghoul-ash!
Four. One to change it and three to write the environmental-impact statement.
Just one, if you put it in the right place.
3. One to screw it in, the next to claim credit and the third to be a bot that reposts.
Three - one to change it, one to not-change it and one to both change-and not-change it.
