Here's how to do it:
It's fun to gang up on one dude in an effort to get that person extra-drunk.
The rewarding part is threefold: hitting a full can of beer which sprays everywhere, the excitement of someone else hitting a full can of beer can, and drinking beer.
Plinking cans in the back yard, shotgunning beer...pretty great summer time activity.
p.s. be careful. mind your backstop, etc.