Another Shermer Plug

Due to a lack of having anything to write down with any substance, I've decided to post a new Shermer video I found in my YouTube Feeds.

This is much more for fun, and is a tad bit less interesting than the last one I posted (about the spoon bending), but perhaps someone might enjoy this simple trick. 

And perhaps help me figure out how the trick could be done on the streets. And don't tell me it's magic.