What is the most stupid thing you ever did?

[foster]

I once threw a huge family-sized can of beans onto a roaring campfire. I thought it would be funny.
Everyone ran off and took cover, waiting for the inevitable explosion. But the big bang never came, and finally we all stood around, daring each other to go try and get the can out of the fire, when KA-BOOM!
The explosion was so deafening, all we could hear was a high-pitched EEEEEEEEEEEE noise in our ears. And with the fire now out, we were in total darkness out there in the woods -- except of course for all the little red embers of fire in the trees, on our vehicles, AND ON OUR TENTS!
That one act of silliness ruined about five tents.
It was a hoot!