Wow, I just had the same thing happen to me! I washed my car, took about an hour and a half. I did have the key in my pocket the entire time, but everything in the car was off. I was not playing the stereo or anything. I left my car parked in the middle of the garage and went into the house for about 2 hours. I am about to head out for lunch and so I wanted to move my car to the left side of the garage. As soon as I hit the start button the entire dash is blinking rapidly and clicking noises. This went on for about 10 seconds and finally all the dash lights came on. I pushed the start button and the car turned off. I pushed it again and everything came on normally! What the heck is going on???