Imagine this. You're lying around at home on a lazy afternoon, reclined back watching TV. Your significant other is in the other room. You've fallen asleep watching your favorite show. All of the sudden your significant other smells something.... Burning? They're looking around, calling your name from the next room to ask if you smell it too, but there is no response. So they get up and make their way into the living room where you've been watching TV. And, they begin screaming. They can’t believe what they’re seeing; because YOU are what's on fire.
Your significant other frantically tries looking for their phone so they can call 911 all while trying to figure out how to put this fire out. But they're too late. You're like a human wick, your body fat is fueling the fury of flames. By the time the fire department gets to your house, here is nothing left of you... Except your foot. There is no other explanation but no one wants to call it what it is... Spontaneous Human Combustion.
https://critical-thinking.org.uk/spontaneous-human-combustion
https://www.history.com/news/is-spontaneous-human-combustion-real
https://allthatsinteresting.com/spontaneous-human-combustion
https://allthatsinteresting.com/mary-reeser
https://www.huffpost.com/entry/frank-baker-spontaneous-combustion_n_4024833
https://www.livescience.com/42080-spontaneous-human-combustion.html
https://science.howstuffworks.com/science-vs-myth/unexplained-phenomena/shc.html