Just two, but they'd have to be really small.
Two, one to change the lightbulb and another to show one they changed earlier.
You never can tell. The Sandpeople always ride in single file to hide their numbers.
Whys the lightbulb got to be white!*
None, no light bulb dare go out in the presence of Chuck Norris.
Claustrophobic
They like to express the right to bear arms.