http://www.time.com/time/magazine/printout/0,8816,1061418,00.html(it's a registration link, so paste the URL into google, search, and click link from there).
small excerpt...
TIME Are you on drugs?
CHAPPELLE I haven't smoked marijuana in months. My drugs these days are nicotine and coffee.
TIME Are you in a mental facility?
CHAPPELLE No, no, I'm not in a mental facility. I'm actually staying with some friends
, although I did consult a doctor when I was here.
TIME A psychiatrist?
CHAPPELLE It was a 40-minute session. I guess he was a psychiatrist.
We just chewed it up, and that was the extent of it.
TIME Why did you take a break?
CHAPPELLE My personal feeling is I didn't like the direction of the show. I was trying to explain it to people, and no one was feeling me. There's a lot of resistance to my opinions, so I decided, Let me remove myself from this situation. You hear so many voices jockeying for position in your mind that you want to make sure that you hear your own voice. So I figured, Let me just cut myself off from everybody, take a minute and pull a Flintstone—stop a speeding car by using my bare feet as the brakes.