Gosh that's why when in the kitchen, we have to be focus only on what we're doing there. Coz there's a huge chanve this can happen. I never experienced such and don't ever want to experience it. But I already experience burning a rice because I am so focus on my phone, I forgot that I am cooking. And this happen bot just once but lots of time. So what I did is, even when using my phone, I never leave stove and just stay and wait there until what im cooking is finally done.