It all started with Evel K. in the 70s I think. We'd see him on Wide World of Sports, get his cycle jumping toy as presents, etc. Everyone started building wooden ramps to emulate Evel. It was actually a lot of fun so long as you didn't add too much speed or ramp height.

"Evel K.", ha ha. Never heard him called that.

In the photos I see the transition from the "high rise" bicycle to the "BMX" bike. While somewhat cool looking, the BMX bikes, for me it was also the end of an era — my era — for biking. Instead of BMX bikes I moved instead on to 10-speed road bikes (later 12 speed ... now 1000 speed or whatever they're up to).

The photos also shows a time when wearing a helmet was not a thing. That did come shortly after (I mean at the time of these photos, I don't think you could even go to a Sears or wherever and buy a "bike helmet". After a rather nasty spill I had riding to work one morning, I became a helmet convert.

Yes, and BMX's were quite a hot & recent thing at that point as well.