Hate to say it but,, I did the same thing with my buddies brand new ZR580 Cat many years ago. My buddy did not hook the ramp in properly on my deckloader. When the new carbides dug into the ramp the ramp pushed ahead and I ran into the back of my truck. Fortunatly there was only a few scratchs on my tailgate. No injuries. A lesson well learned.
...And those are just the ones caught on video. Poor buggers have to live with the possibility of family and friends firing up the vids at any time at home-Ha!:d