I've had these thoughts from time to time for most of my life and actually acted on it once when I was a teenager, drove my car right off the road. Wasnt hurt too bad and didnt involve any other cars but I just couldn't resist that urge. I am lucky, it could have been much worse. I still get those types of thoughts sometimes even different ones like stepping in front of a train as its pulling into a station. Its a self destructive urge thats scary to have.