From: utzoo!decvax!harpo!npoiv!alice!rabbit!ark
Newsgroups: net.misc
Title: Pretending to be insane
Article-I.D.: rabbit.605
Posted: Thu Jul 15 10:57:02 1982
Received: Sat Jul 17 06:25:25 1982

I also recall reading an article about this.  It may have been in New York
magazine.  A writer showed up at a hospital behaving normally, but
(falsely) claiming that he occasionally heard voices saying things
like "Thud."  It took him months to get out of that hospital.