Just one. But it takes about 8-10 visits.
Giraffe.
None! In Soviet Russia, light bulb changes you!
Three. One to hold the light bulb and two to spin the ladder.
Well, first off, it's called a lamp...
Because he had a crook in his neck.
Because 7 ate 9. Credit to a guy I work with.
Because no one wanted Windows Nein!