I can name two of the guys doing that bke stuff. Martin aperijo(?) and Pat Romano.
They were from the way back of flatland freestye. GT rider and Skyway I think. Funny bit of info about me, I have only once in my lifetime of riding a bike have ever owned a bike with gears. I rode a mountain bike for a few months when I lived in Arizona. From the begining it was all BMX, then I moved to Boston and got that last BMX stolen and went and got a single speed clunkerwith an expolding masterlink fixation. After that was my old Zeus track bike. I think it was 30 years old or so, I could be way off. After that I scored an amazing Basso track frame from someone back in the hoemtown. Then BLAH BLAH BLAH. I am sorry for the mindless rambling of my cycling life.