When I was 9 or 10 I went with some friends and their parents to a park that had a massive tree that was very easy to climb. Two of the boys and I hopped on and

When I was 9 or 10 I went with some friends and their parents to a park that had a massive tree that was very easy to climb. Two of the boys and I hopped on and just kept going. Finally turned around either because we were shouted down by their parents or because one of us finally had some sense. Later on that day, a girl from their family was climbing on a low branch (maybe 2m off the ground), fell, and seriously messed up her ankle or knee. She was on crutches for a while. The boys and I must’ve been somewhere between 8 and 12 meters off the ground. In retrospect it’s one of the most dangerous things I’ve ever done, and I’ve done multi-pitch trad climbing.