So, I was driving in a residential area. There was a little traffic, I wasn't going very fast. There was a guy riding a very cheap MTB on the left side of the road, which means the wrong side of the road against traffic, with no helmet. My first thought was, "what a dumb mother ****er". At first I was going faster then him, but as I got closer to a stop sing we were both going about the same speed. The van in front of me, who was now past this dumb mother ****er, stopped at the stop sign, with her signal on and made a left turn. This dumb mother ****er ran the stop sign and just T-boned the van. He hit the van pretty hard, he fell over and started ranting and raving that he is hurt and is going to sue. He got up and he didn't look hurt to me. I had stopped my car in the intersection and turned on my emergency lights and got out. The guy was still ranting and raving. I said something like, "shut your ****ing mouth *******, I saw the whole thing and it was 100% your fault". The driver of the van called the cops and I had to go, so I gave her my info. There was a guy in front of his house on the corner. I talked to him and I asked him if he could make sure the dumb mother ****er didn't leave, and I was off to the office. Un****ing believable!! I'm sure I'll be giving a statement soon.