"Nobody said I needed doubles on that!"
or
Twenty. One to hold the bulb, two to turn the ladder, and 17 to be on the guest list.
or
One. No, two. No... How many do we have on the truck?
or
One -- but it's an 8 hour minimum.
or
What's a light bulb?
or
Uh...standby, I'll check on that.
or
Actually, agents will screw in just about anything.
or
WHAT?
or
Just one more, guys, I promise.
or
Seven. One to change it and the other six to sing about how good the old one was.
or