Billy Crystal: How do you find what's going to make everybody have this strange...

How do you find what's going to make everybody have this strange reaction in their bodies, this response that's sort of chemical and physical all at once - this noise and emotion that changes how you sit? A laugh is a weird sound, and when you get a couple thousand people making it at once, it's really strange. But when I can feel proud of myself for causing it, it's great.

Comedian