The man says: "You go up there and tell him off. Go on, I'll hold your monkey for you."
or
They keep dropping their trunks.
or
100: One to do it and ninety-nine to say "I could've done that."
or
None, because people who glow in the dark don't need light bulbs.
Note: Topical to the Chernobyl Reactor disaster of 1984.
or
One; she designs the bulb to crawl up the wall, unscrew the old one, and screw itself in.
or