PVC is some pretty versatile stuff. You can make a homemade paintball gun, a carrot-firing rifle, or even the Burrito Blaster spud gun. YouTuber Top City Gear (aka Drew) made a PVC blowgun a few months ago, but he wanted something that packed a little more punch, so he built a pneumatic Nerf gun that looks like it really hurts. Watch him try it out on his friend in the video below (skip to about a minute in to see it in action). - This one is for Spencer.