The vehicle in front of me suddenly stopped and inexplicably started backing up. I blew the horn but they kept coming. Bashed my bumper pretty good. My insurance adjuster asked if I had video of the accident. I did not. She warned me that the other driver could lie and claim that I rear ended them. Given the damage, that's what it would look like. After all, what actually happened was just crazy. Luckily, there are still honest people in the world (wouldn't know it from Washington) and they accepted responsibility. Folks, install a dash cam. I wish I did (learned my lesson and just installed them). It might save you some serious headaches in the future. JDonalds wrote a good description of how he did it for his Clarity in the "what did you do today..." thread.