Dumb things that you did.......because you didn't know any better.

When we were in grade school I would go over to my buddies house and screw around in his dad's welding shop. We found some 12 ga buckshot shells and threw them on the bench. Then in our our dimly lit brain we figured we should clamp
them in the vice and kneel down under the vice and hit the primer with a punch and a hammer! BANG!!!! Ears rang for days...