pressure cooker - help needed, page-5

If Watso can't hear the pressure cooker whistle (hearing aids lost?) and can't see the steam (where's his glasses), then thinks it requires 3 hours to cook the contents of the pc, then posts saying the results were delicious despite the burnt food inside, is somewhat alarming. There would be no food value left in the pot and the taste of burnt food may not have been evident to his jaded tastebuds. Once food has burnt, the nastiness of the burn goes throughout the rest of the food and should be discarded. It is also unhealthy to eat. A bit alarming really.....