"People close to Zappa told me there was a good chance he could be diagnosed as manic-depressive if "they" ever got a chance to look at him. There was no way I could know if he'd have the patience to give me one minute or one hour. Expect anything, they said. Radical mood swing is the core of Zappa’s personality — and no doubt the core of his creativity as well. When I knocked on Frank’s door, he opened it with the slightest possible shred of acknowledgment. No handshake. I knew immediately where his mood swing was at the moment – several fathoms below sea level. That long black cloud was down and was there to stay for the duration of our first interview. His disdain for the ‘interrogation,’ as he called it, remained obvious. On our next encounter, the cloud disappeared and Zappa lightened up, rapping casually with fans who wandered in, and generally enjoying himself. Surprisingly, the results of both sessions were somehow consistent: Laced in with Zappa’s unrelenting cynicism, the hilarity was always there — regardless of what mood he was in. The only difference seemed to be whether or not he was laughing."