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--Saw an interesting device yesterday: a piezo element from a lighter, taken out and attached to a piece of wood. Wires from it are attached thru holes in an up-ended plastic film can cap. Spritz explosive vapors into the can (the guy who showed me this was using Binaca breath spray; it smells vile once ignited!), attach can to lid and press trigger. Neat!
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SF Bay Area
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