That's very funny! You poor thing, you must have been a little spooked!
I have a freak-out story... A few years ago, I picked up our new car and carefully parked it in the driveway. My husband was out of town and I wanted it to still be brand-new when he came home. I was very paranoid that it would get stolen, so the next morning immediately after waking up, I went to check on it. The car was backing out of the driveway and started driving down the road!
Actually, it wasn't... someone with the exact same model and color was using our driveway to turn around, but I just saw the car backing out! I swear my heart stopped for a few seconds!