All you have to do is pick a person you want to Shoot the Booze with then you fill your water gun up with beer or whatever beverage, like wine coolers, etc. Stand away from each other, far enough so when you shoot it will reach the person you are aiming at, open your mouths then pull the trigger. The object of the game is to see who can shoot the beer into each others mouth without missing, and who can swallow the beer fast enough without choking. Remember you both have to be Shooting the Booze at each other at the same time. The winner is whoever can swallow the most beer without stopping for air.