How could I and my geek friends have missed out on that one?
But we did the flour in the can trick. Open end coffee can about ½ full flour tossed spinning to create dust cloud, ignite it! A nice loud WOOSH.
Oh, so you missed the fill your mouth with lighter fluid and then spray it out into the air and light the cloud trick. Nice effect, stopped doing it when I lit my chin on fire(no injury, just fear:)), but my friends persisted. No one was ever injured.
As for drawing weapons in the 1940s and 50s I drew airplanes, fighter planes(P51,P47,Corsair,etc.), shooting down Nazis and Japs. During the Korean war it was Sabre jets against Mig15s, Migs always going down in flames.
I am sure if my friends and I were in school today we would all be in jail.
BTW, I didn't make my own black powder, my step father had a supply and my brother and I would "borrow some" for our own uses, never telling about it of course.