Way back in 1974 my friend and I were at the " Paved Wave " skate park in Cocoa Florida. A kid had rode his stingray bike complete with the banana seat to the park. One thing led to another and someone dared my friend to take the stingray down the main ramp into the big bowl. My friend took the challenge and made it all the way through the run.
I don't know when they started riding BMX in parks and ramps but I'm willing to bet no
one here can take it any more old school than that
