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How to Make a Grappling Hook Gun With a Fire Extinguisher

After realizing there were no instructions on the web to make a grappling hook gun, MIT student Christian Reed decided to invent his own and publish the instructions. Because nothing says "I love you, internets" like a good grappling hook gun.


Now I'm off to get a dry fire extinguisher. [Instructables via Hacked Gadgets via Make]

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Arggh! there goes a...snake a snake!

For some reason this reminds me of the first Super Soaker I had.

Also, what's the point of the part where they show Bin Laden in the video?