Very nice performance, I've been doing clip trip for about a year now and love the reactions I get every time I use it. It's one of the best impromptu pieces I've come across, all you need is a paperclip and an audience.
You can also find it in Joshua Jay's "Magic: The Complete Course", credited and included with permission, of course.
It's not very workable in most situations, but it makes a nice little effect for random impromptu performances for a small audience when there happens to be a paper-clip lying around.