None. They wait for the electrician to make a mistake and yell at them for doing it wrong.
Two. One to identify that the lightbulb has indeed burned out, and one to call the maintenence man to change the lightbulb.
Three. One to do it, one to complain that it has already been done before, and one to repost this joke.
Two: One to change it, and the other one to change it back again.
Exactly the same amount as the Redditors on and .
We've had to wait 2,000 years for his second coming.
One. They stick the bulb in the socket and wait for the world to revolve around them!
They love to watch mistakes being made.
Britney Spears
Underlay! Underlay!
Weeeeeeeee!!!
Don't feel bad, YOU CONDUIT!!!
One.