I was given 25 lbs of old Dupont blasting powder, used to split fence posts years ago.
While on the fire dept we watched the fireworks at ground zero, and learned how to make
a non-exploding impressive fireball. Get a steel 5 gal bucket, drill a small hole in the side
at the bottom, put in 12" of fuse 6" inside 6"outside, and cover it with your old powder.
Wait till dark and light, get back 50 feet and enjoy the fireball and the mushroom cloud.
Billy