I watched an interesting show this weekend on National Geographic called Pick Pocket King. It follows Vegas act Bob Arno to Naples Italy in search of the "art" of pick pocketing. I found it to be an extremely interesting episode because pick pockets seem to be a hot topic throughout this forum. Bob Arno finds a group of men who will teach him their techniques including how they pick pocket money belts. I've posted the link below. It's quiet long but the money belt (which really was intriguing) is at the 17 min mark.
I'm sure that it's a one in a million chance that someone has theft associated with their money belt, but it was very neat to see how easily they can pick it. Now, obviously in the episode, they are demonstrating, so it's hard to say how easily it could be done on a train/bus/sidewalk but nonetheless, I found it to be something worth sharing.