not sure how it happens honestly, but ive seen other pics like this. thats as high as ive seen em get. maybe the shock to the drivetrain when he bangs 2nd gear causes it, not sure. the track is nowhere near bumpy enough that close to the starting line to cause the bike to jump like that either, so idk
oh, and most streetbike guys wear sidi boots with the metal around the toes, because they drag their feet thru 1st and most of 2nd gear. this guy looks like hes wearing some simpson boots or somethin, they look like the ones the pro stock bike guys/girls wear. dont need a moto gp style boot in drag racing imo.
ill see if i got any more pics like this
edit: wheelhop-makes sense, thanks otb