I came across this thread and site explaining to my wife what a pressure cooker is.
It’s not just an urban legend. I grew up ith my mom using opressure cookers, and 2 of them exploded (yes, actually exploded) during use. One of them exploded when I was a kid, splattering beans all over the kitchen wall and ceiling. My dad had to repaint the kitchen after that. The other time was about 10 years ago. I was in my mom s kitchen and it exploded, almost injuring or possibly killing her. The top left a huge dent in the enclosed kitchen ceiling fan. Google will also provide you with news stories regarding exploding pressure cookers and their devastating effects.
As someone who has experienced this first hand, I can only be grateful that my mother wan’t seriously injured or killed. It’s not just an urban legend. It does happen.