"Every new routine I have ever written and performed probably occurred extemporaneously. Then after you have fleshed it out and tried it out in front of a number of audiences and it works, you put it down on paper."

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Hopefully the process is to spot things that would be grist for the funny mill. In some respects, the heavier subjects are the ones that are most loaded with opportunity because they have the most - you know, the difference between potential and kinetic energy? - they have the most potential energy, so to delve into that gives you the largest combustion, the most interest. I don't mean for the audience. I mean for us. Everyone here is working too hard to do stuff we don't care about.

— Jon Stewart