Dumb/Stupid Things You've Done...and Survived

A thread like this was probably done before but I didn't find one doing a general search for both "dumb things" and "stupid things".
It doesn't have to be automotive or Mopar related.
Time to 'fess up and tell us all what you managed to survive.

Here's one of mine:
My junior year of HS was the year everyone took Chemistry. Of course no self-respecting teacher would issue chemicals for either a class assignment or experiment that would allow you hurt yourself.
But...my lab partner and I came up with the great idea of saving all of our experiments for the entire school year. So how did we do that? All lab teams had a locking drawer for their lab equipment. We put a large beaker in the back corner of our drawer and simply dumped all of our experiment chemicals in it after the completion of our experiments.
We could have either created life in that beaker or blown the 2nd floor off of the school science building along with us and the rest of the class!
Hindsight being 20/20, that was a really stupid thing to do...but we survived.
On a humorous side, it was hilarious to drop an Alka Seltzer into somebody else's experiment when they weren't paying attention. They'd turn around and their experiment would be wildly bubbling away when nobody else's was. The teacher couldn't figure out what they'd done to cause the bubbling reaction.

Now, what did y'all do that you shouldn't have done?