I went to a race, prob in 1982ish, at Deddington near Banbury. That was when there wernt really pro freestylers. Even the trickest riders raced as a day job. Just before the pro main, when the 8 top guys were all getting ready to start, there was some kind of problem and they had 5 mins to kill. Chris Young hopped over the gate and started practising rollbacks down the start hill! Very cool.