I thought I had seen the coolest way to kill the data on a CD which was linked on this article. But watch the video above to see the new coolest way to kill a CD. A high voltage is generated on either side of a spinning CD and it jumps the gap by using the path of least resistance which in this case is the spinning CD. Of course the CD is mostly plastic except for the thin layer of foil which is where the data is stored. Each time a spark makes the jump it destroys a tiny piece of the disk until all of the CD foil has been destroyed!
Thanks for the tip Paul.