I know a guy who had two pounds of 3f that got wet. After drying for two years he decided to burn it to get rid of it. He threw a whole book of matches on the two pound pile watching the matches burn on top of the pile. With no luck he went inside to get more fire. While inside he got a belly ache and had to make poo. Once done he grabbed a lighter and went back to the pile of powder with a new plan make a trail like in the movies light it it will burn to the pile and puff gone. But reaching into that pile with those smoldering matches on top was a bad idea I spent 6 hr in the ER and a week cleaning the burns. Funny now then not so much.
