Not knowing any better (when we really did), my cousins and I took turns shooting a Daisy BB gun at the primer of a 12 gauge shotgun shell we laid on a log about five feet away. It took a lot of shots, but eventually my shot hit the primer and chaos ensued.
Got our butts beat good by my father and uncle.
I was smart enough to take the pellets out. Put the empty shell on the end of my BB gun and pulled the trigger. Loved hearing that boom, and it scared the crap out of my friends.
Did it one too many times and it cracked the barrel of my BB gun. My dad didn't buy my explanation if how that happened.