[A Condesending con descending]
or
The batter.
or
None, because people who glow in the dark don't need light bulbs.
Note: Topical to the Chernobyl Reactor disaster of 1984.
or
The man says: "You go up there and tell him off. Go on, I'll hold your monkey for you."
or
A sponge!
or
he got a little behind in his work.
or