One minute you are reading Stephen King's latest novel, and the next minute you are conversing with your toaster about how much you dislike jam.
Insanity can strike at any moment.
The only defense is to be prepared by knowing the early warning signs. Everyone you meet appears to have tentacles growing out of places that you wouldn't expect tentacles to grow. You start out each morning with a 30-minute jog around the bathroom. You write to your mother in Germany every week, even though she sends you mail from Iowa asking why you never write. Every time you see a street sign, you have a tremendous urge to relieve yourself on it.