I blew one up by accident once.
In the early 80's I ordered a psilocybin mushroom growing kit from the back of a High Times magazine. The instructions included sterilizing the agar double boiler style in a pressure cooker, pouring the sterilized liquid in petri dishes, moving to a an enclosed glove box, and allowing to cool before before adding mushroom spores.
In my excitement at doing this scientific operation, I failed to put any liquid into the bottom of the pressure cooker - in the pressure cooker, I only put in the smaller pan with the goop that I was supposed to sterilize.
So you know how when you use a pressure cooker, it's been on the heat for a while and the little weight on top is supposed to bounce around and steam and sizzle? Well mine wasn't. So imagine me, still sporting my late 70's long hair, flannel shirt, standing there in front the stove waiting impatiently.
I finally raised up my hand to flick the round weight to get it sizzling and that's when the relief plug in the lid blew. A very loud sound, I practically jumped out of my skin, the metal plug missed my arm by inches, there was a strong geyser from the liquid in the inner container spewing hard out of the relief hole and hitting the ceiling with force. This hot brown liquid was raining down on me and the plug that blew was embedded in the apartment ceiling like a slug from a gun. My girlfriend at the time (wife now) was on the floor laughing the whole time I was cleaning up.
This is your brain on drugs.
But anyway.... before I ruined our pressure cooker, we sometimes cooked dried northern beans.