In the video below, the Crazy Russian Hacker demonstrates how to open a can using only your hands and a concrete surface. If you've ever been stuck without a can opener, you know how completely frustrating it is to not be able to access your food. The Crazy Russian Hacker's trick is so simple and easy, however, you'll wonder why you never heard of this before. We at SF Globe love sharing tips and tricks that make life a little easier, and this one is definitely going to come in handy.