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  1. Halloween Props
    I'm looking at making an pneumatic prop that works like a "mouse trap", to create a large 'bang' sound when triggered via a sensor. Basically, something like a mallet hitting a wall (or piece of something) to make a loud bang. I hope to place it above their heads. Any ideas on how I can...
  2. Halloween Props
    E-firecrackers are the hot ticket, so has anyone tore one down to get to the science behind them? After searching the forums and coming up empty, is there anyone who knows how they work?
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