I know darn well I've had my fair share of those type of moments but for now only one comes to mind.
It was during the time I was trying to master the
art of riding my unicycle. Probably don't need to say more, but I'm gonna. Ps: we lived in town and the neighbors closely kept tabs on my progress, so whatever happened was pretty much "public"...
So, I took off on the well-beaten sidewalk "path", determined to conquer that one wheeled beast, and, suddenly, both feet came off the pedals at the same time. There is no way to "coast" on a unicycle. At this point in time, I had become a passenger. I balanced as best I could, and hung onto the seat, jaws clenched and waiting for the outcome.
I ended up veering off into the grass, wiping out, landing on top of the wheel, with the axle up my a....well, you get the picture...
Edit to add: I eventually did master the unicycle and actually rode it in parades, with the spokes decorated and me wearing the sparkly blue outfit my mother made for me.
One more: Grandpa always had a huge cache of "black cats" and bottle rockets. Not only did he let us do whatever we wanted, he participated lol! He and Grandma lived in a really nice subdivision with big fancy houses. A girl in their neighborhood and I used to hang out at my grandparents' house and one of the things we did was experiment with the fireworks. There wasn't a lot of light out there after dark, so it was easy to conceal yourself.
On this particular evening, "Jenna" and I were together and were watching the neighbors across the road who were standing around a car and saying goodbye to their guests. I have no idea what possessed us in that moment, and don't recall by now which of us actually "pulled the trigger", but a lit bottle rocket landed on top of that car, sending people scattering and diving for safety. I didn't dare to breathe until I heard peals of wild laughter from those people...and, believe me, neither of us moved for awhile, concealed in the darkness and almost peeing with uncontrollable laughter. Nobody was hurt. The car wasn't damaged. Our parents were never told. Grandpa laughed his butt off.
Ahhh, childhood...