Hi All, Like Tom I used to stuff 22 shells with match heads and crimp them. One day my friend and I put two on the tram track and waited. BLAM BANG, The tram brakes slammed on and the poor dirver got out to see what he had hit or what had blown up. Two boys sitting on the fence trying not to laugh. Oh and what about two half inch bolts part threaded into one nut with the gap between stuffed with match heads. Tossed at the brick wall. Amazingly I still have all my fingers, eyes, etc.