For me, I think it was when I was playing in the yard, and saw one of my mom’s pots of dirt for her garden, and I thought “yeah this would be good to dump on my lap”
It was full of fire ants. Big, angry, north carolinian fire ants.
I was covered in red welts and all I remember is screaming at the top of my lungs while my mom sprayed me down with a hose
10 years old, playing at a friend’s house whose backyard woods had a creek running through them. We were jumping off a small bridge into the shallow creek and I landed funny on sandbar and felt a little pop in my foot. I jumped a few more times before the pain prevented me from continuing. At the doctor the next day, I was told that I came very close to entirely breaking my growth plate.