How-To: Pneumatic pop-up Halloween screamer

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Instructables user Back Roads just posted this tutorial describing the low-cost pneumatic system he hacked together to build this haunted house prop. [via Hack a Day]

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I am descended from 5,000 generations of tool-using primates. Also, I went to college and stuff. I am a long-time contributor to MAKE magazine and makezine.com. My work has also appeared in ReadyMade, c't – Magazin für Computertechnik, and The Wall Street Journal.

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