Just one, if you put it in the right place.
Na na na na na na na na BAT MAN What do you say when a stolen Batmobile drives by? Na na na na na na na na BLACK MAN
Do you mind getting out of my son.
Two, one to change the light-bulb, and one to observe how it symbolizes an incandescent beacon of subjectivity in a netherworld of cosmic nothingness. This is courtesy of Spencer Reid.(CM)
You don't know man, you weren't there!
Just one, but they get extra credits for it
None. Mice can't change light-bulbs as they are mere rodents without the physical or mental ability to do so. Not to mention it's much safer for them to pilfer food in the dark.
