I'd one of those as a kid, bloody deathtrap.
Took a 6' dropoff completely by accident.
Was cycling through a shopping precinct in Glasgow in the mid 70's. I was probably aged about 8 at the time. One of those brutalist type outdoor ones. A series of ramps with staircases alongside them running through it.
First there was a ramp, i went down the ramp at speed
Next was another ramp, and i went down that one too at speed.
The third ramp wasn't a ramp, it was a frigging staircase
of course i didnt realize that till i flew off the frigging top
Landed, bounced and came a cropper. I'd no brakes on it anyhow, so even if i realized i couldn't have stopped, and probably for the better because at least i cleared the stairs. Lucky i wasnt badly injured now thinking back on it.