How to open a bottle with Paper!

Although paper can be used in many different ways, man has encountered so many other ingenious uses for paper... And this one is really amazing! Ever thought of opening a beer bottle with nothing but an A4 paper sheet?
Well, it looks pretty easy and it might be great way for winning bets with your friends!
Macgyver, eat your heart out!

If you have any other documented odd uses for paper (other than the ones we are familiar with), you are welcome to share them with us!