A color change I just made up... don't watch this unless you want to see the most mind-destroying magic trick of all time. I don't mean to toot my own horn, but David Copperfield pretty much took a crap on the Death Saw when he watched this. Oh, and NO GIMMICKS, I promise 
http://www.youtube.com/watch?v=sjGHddvTDDA
http://www.youtube.com/watch?v=sjGHddvTDDA