If you've ever been pelted by an errant snowball while shoveling the driveway or going out to get the mail, there's only one way to make sure it'll never happen again. Fight fire with fire, build this homemade snowball machine gun, open fire just once, and no one will throw a snowball within miles of you ever again.

Developed by former NASA engineer and designer of the animated ugly Christmas sweater Mark Rober, this snowball machine gun flings snow-spheres at rates of up to ~25 per second. But that's not all! It also supports a clip system that makes it easy to make and load dozens or hundreds of snowballs ahead of time, and fire them off with just a three or four second break between barrages. All you need is some PVC and a leaf-blower to build your own version of this overkill device.

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One word of warning though. Make sure if you make your 'balls before time that they're still made of snow when you go to fire. Load this thing up with ice and you might have an actual weapon on your hands. 

Source: Mark Rober