My brothers and I had an old red gloss painted thing; back braking kind. Influenced by all those WWII TV shows like 12 O’clock High(big on US TV in the 60’s) we would practice “bailing out” by belting down the wide suburban avenues, lining up with the grassy curb, them jumping off sideways, landing in a double+ forward roll. On a good day you ended up on your feet with a few grass stains and no dog mess..
Didn’t help me though when younger brother though it a good physics experiment to throw a chain into the front wheel while I was going full pelt. My first slo-mo OTB event but for once there was someone else to blame…still
Oh yeah, must have been about 8.