Going to Sturgis
The biker in the Red shirt is Mark Joseph, who runs the Gipson Tire Store in Millbrook.
His buddy was in a pickup behind him filming the whole thing.
This repeats 3 or 4 times, with each showing going a little bit slower, so you can really see what happened. Notice the biker coming at you duck.
This footage was taken on the Needles Hwy near Sturgis last month. This all happened in less than two seconds.
Thanks Jim F.