I was going to post this in the competition forum but I thought you all would enjoy this. I'm pretty sure the first video was posted on this forum before. It resulted in many on other forums claiming it couldn't be done with stock pistols. The second video answers the nay sayers:
http://www.youtube.com/watch?v=p8475ocNvzw
http://www.youtube.com/watch?v=fKyGUYjCruY
http://www.youtube.com/watch?v=p8475ocNvzw
http://www.youtube.com/watch?v=fKyGUYjCruY