What happens if you inadvertently keep the heat on in a pressure cooker?

[TopHatFox]

http://earlyretirementextreme.com/a-tri ... ooker.html

Light stove, place pressure cooker on heat, wait until pressure valve is active--get distracted--remember 30 minutes later to turn off the stove.

What's inside the pressure cooker? Mush? Burns? Explosions?

[jacob]

First mush, then burns (once all the water has left via the safety valves), later on you might even start setting the kitchen on fire.

[Jean]

but in 30 minutes, you're very unlikely to go past the mush phase.