Yeah, I was just looking at it on Facebook.
I saw this image damn one of the comments now. As you can e it's really close, and he says he was bumped by the car. I'm not justifying what he did, but it would appear that from his perspective, well, he thought that was the thing to do.
Remember, he was in a similar situation five or six months ago and got badly injured while he was dragged for quite a distance by another car while trying to stop it with less extreme than means.