Apparently both parties underestimated each other, The RR driver didn't think it would be a problem for him to get in the mix of the riders, and probably figure "they'll move" and well... they didn't , this is what agitated them to begin with , they wanted to own the HWY.

The Rider(s) saw him as an easy target for abuse and figure "what is he gonna do?" calling police and filling a report was not an option, most where unlicensed, unregistered Bikes and Riders. so messing with the asian guy was their "thrill" for the day.

all the speculations as to what happen? well it was a D1ck measuring contest where they all lost.

now as to what would we do in a similar situation, well it depends really... one thing is for sure if the RR driver would have started knocking down bikers along the way it wouldn't have made him any different than them. he just wanted to get his family to a populated location so they had a better chance.

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