Ah yes. How many times has this problem come up in your life? You've invited 5 friends over to the house for pizza and beer and much to your shame, you can only open one bottle of beer at a time. Well, this video will show you how to save face next time that pesky problem pops up.

Okay, so maybe the problem has never actually happened to anyone ever. it's still a cool trick even though you may never encounter an opportunity to use it. Still, as the Boy Scouts say, "Be prepared."

All you need is 5 friends, 5 bottles of beer and 5 rulers. make sure they are good strong rulers. You know the ones I mean. The wooden ones with that piece of metal running down one side.