Recapped by Greg Wilson is a classic, Sharp by Craig Petty is almost the same thing but made a bit longer and visual. Also, i have a trick of my own called Sharp Focus which is similar in plot compared to Recapped and Sharp but mine is very visual, snappy and direct and finishes quite nicely. Another trick of mine using a pen/sharpie is Pen-dulum which is where you visually take a pencil (or any long and thin cylinder shaped object like a straw) and change it into a Sharpie, ready to go into your next routine such as the ones mentioned earlier. (PM me if you're interested in any one of my original tricks)
Here's a performance of Recapped (which can be found on Off The Cuff):
http://www.youtube.com/watch?v=csMlFD2ESBI
Here's a performance of my Pen-dulum (which is unpublished):
http://www.youtube.com/watch?v=twaJbcBMND4
Hope that helps.