I took apart an old lawnmower engine to see what was inside...it was broken already though... I have to agree, I don't get the concept of wrecking something that functions. Don't get me wrong there is a part of me that like to see stuff get wrecked if it was broken or worn out anyways... maybe see what I could do to it, but I would have never thought of that combination...black powder and an engine....Somehow the idea of using the same stuff used in a cannon, and having my face blown off by flying shrapnel would call me to reality.