When performing a Silent Takedown, use Knockout Smash to instantly render the target unconscious.
Nearby enemies will be alerted so plan your attack carefully. While using the Line Launcher, target unaware combatants and drop down to perform a powerful takedown.
You can also "recharge" the ability to use this when facing several enemies by performing a Silent Takedown. You cannot perform Fear Multi-takedown against brute-type enemies. Fear Takedowns also destroy the weapons currently held by an enemy so choose your targets wisely you should consider taking down important targets such as medics, shielded, or armed enemies.