Grapple is a novice agility skill that allows the player to counter enemies attacks. When an infected or human lunges at or tries to attack you, press A (or alt on M&KB) and then the direction you wish to throw them. You are able to throw at 90 degree angles left, right, and straight behind you based on Crane's orientation. Grapple can be upgraded with the Brutal Grapple skill, which will cause enemies that are thrown to fall down. Grappling an infected or human into spikes, ledges and other traps will lead to an easy kill. Grappling an infected into the wall with the Brutal Grapple upgrade can break the targets skull or neck, killing them or stunning them.