Well, it may not be anything "psychic", Fischer had a career-long stubbornness about match and tournament conditions. He made many accusations, some true, some unwarranted. However, he was very particular about how , what conditions, and when he played. Some camera men also upset him for some unknown reason, and a chess game was moved to another room. Sometimed he wanted downright offbeat things: some were as bizarre as a requirement for everyone entering the room where the game is conducted to take off head covering.
See also:
http://www.chessninja.com/dailydirt/2007/11/fischer_hospitalized_in_reykjavik.htm
He does suffer from acute paranoia.
Sometimes there is a simple explanation.