The Old Light Bulb Joke in Theatre Terms

How many stage managers does it take to change a...Never mind. It's done.

How many set designers does it take to change a light bulb?   Does it really have to be a light bulb?

How many lighting designers does it take to change a light bulb?   Why bother, the actress can't find the light anyway.

How many props masters does it take to change a light bulb?   Light bulb!? No one told me they put a lamp on the set.

How many theatre students does it take to change a light bulb?   Uh, what's the deadline, 'cause I may need an extension