Chico Brillo vs The Intruder

From a custom clip: Chico Brillo is undercover looking for any signs of the enemy. He peaks around but all the doors around him are locked. Before long he is attacked from behind by an Invisible Intruder! They choke him before he can call for backup while he struggles and convulses. Chico's body seizes up, unable to defend himself against the invisible foe. 

At one point he gathers the strength to attempt a call for help but is choked again from behind! Struggle as he might, there's no hope for Chico and he is made to endure the beatdown. Eventually the fight is squeezed out of him by the Invisible Intruder and he is left lifeless on the floor.