Seriously though, if they didn't take a picture, have it on video, or sign a waiver, it's always possible.
My friend's parents' van literally fell off a jack once. The repair shop tried to pass it off as "it must've come in this way" after trying to hammer out as many of the dents as they could. It took 6 months' worth of constant pressure for the stupid shop to cave in and do the work to avoid going to court.
DOH!
Though same similar story from a member here or was, not sure if he still around.
He has a MP3 that was in for service somewhere and they parked it out front after finishing. He went to get in it, push his auto start.....and the car started moving. The tech had left the car in 1st...
So here he is half in the car half out and in a panic just started smashing his foot searching for the brake. The car ran over the sensor to open the garage door so that starts going up. Just as it was about the clear the car, the roof caught the door bending it. Well this caused more stress on the door as it went up causing all the windows to shatter raining glass down on the MP3.
The owner jumps in the car getting a small cut on his hand, with the rest of the car having glass shards stuck in it.
Actually it was a pretty good laugh cause he also mention the fact everyone went diving like a bomb went off. So just picturing him half in half out, smashing a foot around, and people diving. This was also due to the fact we were standing in front of his car which was fixed.
Though it could have been much much much worst, if he didn't dive inside the car....ouch!