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" If you&amp;#039;ve ever been pelted by an errant snowball while shoveling the driveway or going out to get the mail, there&amp;#039;s only one way to make sure it&amp;#039;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\u00A0Christmas sweater Mark Rober, this snowball machine gun flings snow-spheres at rates of up to ~25 per second. But that&amp;#039;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.         One word of warning though. Make sure if you make your &amp;#039;balls before time that they&amp;#039;re still made of snow when you go\u00A0to fire. Load this thing up with ice and you might have an actual weapon on your hands.\u00A0 Source: Mark Rober "^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.popularmechanics.com/home/outdoor-projects/a19261/how-to-make-diy-snowball-machine-gun/>