Reminds of an incident which will live with me forever.......
Back in the fifties, my mother became the proud possessor of a pressure cooker. The first thing she cooked was 'mushy' peas, which normally involved soaking overnight and then simmering for several hours the next day. I don't know how things work these days, but the pressure in this model was regulated by a needle valve with adjustable weights. Instead of allowing things to cool down slowly, she impatiently removed the entire valve, and we watched in delight as a green fountain rose gracefully from the cooker and decorated the kitchen ceiling with mushy peas.