A. Five!...Six!...Seven!...Eight!
Just one, but the light bulb is going to need to change itself.
All of them.
Two, but don't ask me how they got in there.
A: Two: One to hold it one to hammer it in.
A. The Ultrasound Guy
A. Because everyone keep recycling the same jokes
A. A dentist lets you sit down while he hurts you.