Actually one of the videos in this compilation seems to show exactly that. At 1:54 he is on the brakes possibly to avoid hitting a bicyclist. At 1:57 one of the protesters steps into the street and nails the back of his car with a pole of some sort and it appears he then hit the gas. At 1:59 is when the accident happens.
https://www.youtube.com/watch?v=2fPNhqltzjU
See above.
It could be that, and if so I hope so.
I've had a "friend" who may or may not have had to do the same.
You can't be serious. People are running out of the way before the guy ever throws anything at car.