Almost too many to mention. And none currently spring to mind.
Wait! When I was nine, I wanted to walk on water, so I shoved two armbands around my ankles and stepped in. If the local lifeguard hadn't seen me manically slashing my arms out underwater, with only my feet exposed, and rescued me, I'd probably have drowned.
Quite a few of my problems have also come from eating things. And by eating things, I mean things that are entirely edible. Things like paperclips, styrofoam, coins and twisty ties, to name a few.
And then there's been the regular life-threatening stuff that all seven year old idiots get up to. Jumping down staircases that are way too high, falling off King size trampolines [this one still happens now] and feeding untamed animals.
And yet, I'm pretty sure many of my most daring and stupid fails are yet to come.