I know Fly. It is all fun and games until someone loses and appendage... or blows out a window in dad's house... That was the last time I packed a toilet paper tube full of my homemade powder, run a fuse out of it and wrapped it good and tight with a roll of duct tape. I never thought it would explode like it did. When I lit the fuse It was about 10 ft from the side of the house. A huge chunk of duct tape blasted through the basement window. "It was a rock from the lawn mower dad, honest... smoke? oh, that smoke.... The lawn mower is burning oil and back fired... yeah that's it... you didn't here it running?... uh oh"
Best wishes,
Joe