Headache

Overview

 * When you hit an enemy's weakspot, 20% of that damage is dealt to other nearby enemies.
 * Does not re-deal damage to the enemy, whose weakspot was hit.
 * Unlocked at rank 32 for players, who have The Pursuit DLC.

Notes & tactics

 * This works well with the Drone Launcher against Soakers and Bobble Heads as they will rain down their attacks on their weakspots.
 * The perk is preferrable in non-survival modes, since in Survival it tends to lose its impact later on, due to the infinitely increasing health pools of the enemies.