David, I used to to have horrible thoughts like that all of the time. I remember specifically one time while living in Washington, DC when I constantly feared a fire would occur in my large apartment building. So I would spend all night, every night, worrying and preparing for the alarm to suddenly go off. I got little sleep. A few years later I went for help and realized I had OCD. After a few years on the ol' Prozac with much relaxation, calming thoughts, and therapy, I'm happy to say I rarely have those crazy thoughts anymore. It's nice to feel calm.