BMX'd as a kid on converted Stingrays (broke a lot of frames)...watch this from 2:33 and this was me:
Got a DL and started twisting a throttle at 15. Ended up road racing motorcycles pro. Quit. Raced motorcycles again on dirt ovals. Quit. Got fat in between there. Started back on MTB's in my 40's. Picked up road as a whim. Did a race. Back on heroin. Farted around local. USCF 5-3 first year at 45. Cat 1 at 48. Still here.