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Chris is an engineer at heart. He boasts that he built a car completely out of junk when he was a teenager.

This week he has been developing an air gun to use for his science classes. Basically it’s a diaphragm (like a balloon) over a cylindrical object, like a yogurt container or, in this case, a coffee can.

He took out the grinding tools and made a hole in it and secured the balloon to the back.

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What does it do?

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Aliexpress INT

Have you ever seen Minority Report?

It’s like the cool air guns there. Okay, those are sonic guns but similar effect. He pulls back the balloon and releases. A pocket of air shoots out so strongly that it’ll toss up someone’s hair twenty feet away.

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