Uhhh...., I hate to second these possibly party pooper remarks, but I had a friend in high school who blew of most of one thumb and parts of other fingers while making bombs out of match stick heads. Less sophisticated than what you're doing, but PVC ain't the same as high grade steel in containing and directing the force of an explosion.

I mean, I've read that they work and they're a hoot. I'm curious though, if there's a dark side to the results on some of these.

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1984 300D, 138K