An RV is not that high, but an RV driver is high enough to see beyond the biker and would/should automatically see if there is a reason for a bike to brake.
That's the physical part of my thinking ... the psych part says ... ain't no way a biker, no matter HOW pi$$ed off he may be, would pull an adolescent trick like that.
I think the RV driver is the one that raged against the biker.
Read the article, the witnesses say that the biker did exactly that, pulled in front of the RV and braked suddenly. This was after flipping the RV driver off for some unknown(at least to us)reason. It sounds to me as if the biker wanted to cause the RV driver to lose control and didn't figure on being the bug on the windshield. As I said to another poster, unforeseen consequences. Apparently you are a motorcycle rider and for some reason don't want to believe what eye witnesses said. That is your prerogative.