So please, be wary of placing your bags with valuables out of sight. Remember, "out of sight, out of mind" sometimes applies in cases such as this one. Personally, I like placing my wallet and mobile phone in a place where it is either on me (a tight pocket, like a shirt pocket) or an inch away from me on the table. As for bags, I always loop a strap around my ankle - which would have prevented this one immediately.
This has been a public service post from me, courtesy of Yahoo! News and YouTube user Teddypork.