We have both kinds in playgrounds around my house here in Norway. My kids like both, but the ones from the OP is vastly preferred. They get a lot more Gs in the one with the bars.
I remember we didn’t stop those for anybody. You want on? Sprint and jump. Want off? I still have a vivid memory of trying to get off one, being thrown outward, and getting a bar between the legs. Went to the bathroom and found blood in my underwear. Can’t believe I still walked home after that
Got my first real concussion on one of those things. All I remember is that one minute I was flying off of it and the next minute I was at home and I had been there for several hours.
I somehow flipped over one of the bars and bashed my head on the deck (wooden on ours rather than metal) when I was around 6 or 7 years old. No stitches, though I don't see any noticeable scar. I don't remember much aside from seeing blood and a headache.
This was the centrifuge through which they distilled the kids worth giving a shit about.
Yes, I know centrifuges don’t distill. No, I will not be making any modifications. And, if you asked in your heart, you were probably the chaff spun aside by the Iron Dais of Judgment.