Uncontrollable Fear

Uncontrollable Fear is an effect that can be applied by powerful and imposing enemies. The effect was added in the Fallout 76 update The Legendary Run, though related game files indicate it was slated to launch shortly after Wastelanders.

Overview
The only enemies that can cause the Uncontrollable Fear effect are the wendigo colossus and Earle Williams. Prior to launching the short-ranged attack, the enemy will lower its head and take in a deep breath before bellowing a hideous roar, striking terror into the hearts of all surrounding players, regardless of level. The only counter-measure is Liquid Courage.

Once afflicted by the attack, the perspective switches to third-person (if in first-person), and the the player character flees in the opposite direction of the enemy, with a frightened Vault Boy icon appearing above the head of those affected. The effect lasts for four seconds before full control is regained.

Some control is retained while frightened, and if fast enough, the player character can turn around and automatically run toward the attacking enemy.