I saw this of facebook a few days and commented. Apparently the range rover had a family in. Given the circumstances I think i'd had done exactly the same, but I wouldn't slow down! I would try and get away whilst on the phone to the police. Or even drive to a police station.
Someone mentioned "typical". Unfortuantely it is partially true but one can't get too cynical. There are equally good bikers, I clearly see the bads every single day.
As TC said, it is cut, and we don't see the start of it.