I saw this performed as a teenager and always thought it was some kind of special thread. I never
realized just how often I'd been fooled until I watched this video. There are several different
presentations here (including a great closer by Kirby Van Burch) and there is definitely something
you can use through all these.
If you're looking for a great effect for a smaller crowd or
even stage, this video will give you a great introduction to the effect and enough information to
help you perform it with confidence. You'll need to go ahead and order the thread separately though
because it's not included and you can't get this stuff at Wal-Mart.