Thanks for that Kate! I didn't know that and had a devil of a job getting burnt water off a saucepan a couple of years ago. I'm always forgetting to turn things off. My jug has to turn off automatically (I've melted elements on hose that don't). I once left the gas hob on for 6 hours with nothing on it.
Today I discovered that my cook top, each element has a timer and it turns the element off after that time. I used it to cook the chickpeas as remembering today to turn them off after an hour and a half was never going to happen.