20. This is literally the worst fact I’ve heard all day, so of course I needed to pass it along to my gentle readers. See, after death, there’s a natural decomposition process that a body follows, and if the body’s left in a place without oxygen (like a too-tightly-sealed casket), anaerobic bacteria can literally turn the body to brown sludge, releasing gasses that quite literally make the casket explode. Afterwards, the sludge often drips out of the casket. Rest in peace?