Can Opener

I knew sombody who crossed mountains from Iran to Turkey with a knife only and survived. This is the tip that I learned from him: How to open a can without any tools. This means with your bare hands. It is very simple:

1. You need a flat rock
2. Scratch the top or bottom of the can on the flat surface of the rock - the can will open in less then one minute.

Try it . It may save your life one day.

Offered by Chris.