There are a lot of ways to open a bottle, but this simple method of hammering a nail into some wood is one of the easiest.
All you need to do is hammer the nail into the wood at about a downward 45 degree angle. Just make sure you're using a nail that has a big enough head to grip the bottle top. It might take you a few tries to get the perfect angle, but when you get it right, you've got a simple bottle opener for your garage or backyard.
How to Make a Bottle Opener Using a Nail [YouTube]