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PVC Air Horn to Scare your Friends (or cats)by rickosgood
The Psychoacoustic Bucket from Hellby urant
Start a fire with airby watermelon
How to build a quick and easy pneumatic prop for Halloweenby jbulot
How To Make A PVC Water / Air / Vacuum Pump!by The King of Random
Make a Fire Piston!by rickosgood
Easy PVC Pistons + Simple Airgunby fozzy13
Make a BB gun from a Flashlight! (700fps!)by MrCrowley
Build a Pneumatically Actuated Yeti in a Cage for a Halloween Haunted Houseby ewilhelm
air horn office chair prankby mikeasaurus
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