I don't think I felt "at home" on Earth, as a human, until I walked into a comedy club. - Jerry Seinfeld

The equivalent for a normal person would be to go in to work in your underwear... and try and do your job that you normally do. All of a sudden, you can't do anything. That's how a comedian feels when he's doing a new bit.

Comedy -- and show business -- is-- look: either I win, or you win. There's no truce! Same thing with television: I knew that [Seinfeld]-- I knew-- look: either you're gonna kill me, or I'm gonna kill you. And after nine years, I was still killin' that series, but that series would eventually have killed me.

But the health clubs are a little too strict.
What's with the high level of security? The picture IDs, the security guards, the people signing in and out... What is this, NORAD? I mean the people that have a membership go twice a year, who's breaking in? And what if they catch the person, what then? They run. That's aerobic, makes it even worse.