Make a Can Bomb

This article will tell you how to make a soda can explode.

Steps

Choose a surface that will not be damaged or stained when you throw your "bomb".
Get a canned beverage, preferably a carbonated beverage.
Shake the can with force for a while.
Make sure you are a good distance away from the surface where you plan to throw the can and throw it.
Throw it as hard as you can to an enemy if it's the target.
Finished.

Do not wear light-colored clothing, or materials that soak up the beverage. You don't want to stain your clothing.
If you really want a big explosion, try using a warm soda, like one that might've been sitting out for a good day or so in 90 degree weather.
You should probably not do this if you want to drink the soda.
Don't stand too close to the surface at which you throw the can. You don't want the beverage to stain your clothes.
You can open the can just until you hear the air escape. Then shake it up.
Don't poke a hole in the side before or after the shaking, your going to let out the carbonated beverage and won't explode as well when it hits the surface.

This is not illegal and is not classified as General Mischief if not done in public or with criminal intent.
Make sure that you are in an appropriate place to throw the can. Avoid throwing it too close to other people, things that can be stained, or inside buildings.
Use a can of soda that won't make much difference if you lost it.