Here is another great tip from the CrazyRussianHacker! In this video, we are shown how to open a can without a can opener. The can is easily opened using only your hands and a piece of concrete.
This is a great survival tip for sure. We can always fine a piece of concrete or large rock anywhere in the world. Simply rub the top of the sealed can back and forth on the concrete or rock and then pop the top right off! It truly is that simple and I must say, this tip sorta blew my mind a bit! Enjoy!
Source : Youtube