Beer lets you recover one life point - take a bullet from the pile. You cannot get more life points than your starting amount.
The Beer cannot be used to help other players.
The Beer can be played in 2 ways.
1. During a player's turn, as usual
2. A player can save his life by using a Beer card out of turn, but only if he has just received a hit that is lethal (a hit that would take away his last life point). If a player takes a hit that would have killed him, he may immediately play a Beer card to negate that damage. A player cannot use the Beer card out of turn if he is simply hit.
Beer has no effect if there are only 2 players left in the game (if you play a Beer you do not gain any life points). You can play a Beer card if you are full health or when there are only 2 players left in the game - it just won't have any effect.