The audience changes every night. You're the same person. You have to speak your mind and do the stuff that you think is funny and makes you laugh.
Your body's really only meant to compete at the highest levels of combat...
The last person they expected to connect with a screenplay was the comedic...
Wherever there is a design that is highly successful in a broad range of similar environments it is apt to emerge again and again independently - the phenomenon known in biology as convergent evolution. I call these designs 'good tricks.'