This is the homemade CD launching gun made by Youtuber JZSlenker out of an angle grinder. It works beautifully. I'm going to build my own to launch CD's instead of clay pigeons for skeet shooting, then lay waste to my roommate's DVD collection. I will also break a bunch of his other stuff to make it look like we were robbed.
Keep going for a brief but awesome video.
Thanks to Linc, who uses a razor blade to cut CD's into ninja stars and once almost put an enemy's eye out but didn't because he didn't aim for his enemy's eye, only the eyebrow.