If it makes you feel any better, I was parking for lunch today and putting the sunshade in the windshield when I felt a soft "thump". I had forgotten to pull up the handbrake and rolled forward into the Toyota SUV in front of me.
Didn't worry me too much, started the car, backed up and had a heart attack when I saw the toyota bounce down--I had pushed it up on its shocks.
No damage, just a bit of a scuffing to the clear bra that should buff out fine. Whew!
But I felt kinda dumb.