Laughing Like Crazy

Are comedians psychotic?

In a study in the British Journal of Psychiatry, researchers analysed comedians from Australia, Britain and the United States and found they scored significantly higher on four types of psychotic characteristics compared to a control group of people who had non-creative jobs.
The traits included a tendency towards impulsive or anti-social behaviour, and a tendency to avoid intimacy.
"The creative elements needed to produce humor are strikingly similar to those characterizing the cognitive style of people with psychosis - both schizophrenia and bipolar disorder," said Gordon Claridge of the University of Oxford's department of experimental psychology, who led the study.

You could apply this to much of Hollywood, as well...