Sounds like an accident which led to road rage; very bad to lose one’s temper and the penalty will be painful.
biker rage IS a thing in Socal and in some cities bikers call the shots In many towns they take two lanes and let bikes share one. So you can be going along nicely in the morning commute and get backed up for a mile because 1 or two bikes are in the right lane and all cars a forming a gore point to merge left to get around 1 bike,. In LA they reduce the car lanes and give the entire lanes to a few bikes.