Windows Phone Thoughts: Smartphone Suicide by Vibration?

That's a picture of my Samsung Jack (Blackjack II) sitting face down on my floor. That's the way it looked when I came into my office yesterday morning and saw it laying there. I was completely puzzled because I knew I hadn't dropped it. The phone was no worse for wear, so I put it back up under my monitor where I normally keep it. A few minutes later, my smartphone fired off a notification, where it the proceeded to vibrate itself off my monitor stand and onto my desk. Aha! So that's what happened - over night it must have vibrated its way off my desk and onto the floor. Does that seem screwy to anybody else? No phone should have a vibration mode so powerful that it moves the phone across a desk and onto the floor. Needless to say, I've change my normal profile from vibration+sound to be just sound.