I have ran into multiple instances where I am fighting 2 or more zombies and the screen black screens out on me. It seems to occur when I try to back up against a wall or other large object to prevent zombies from circling around me. The black screen persist after I attempt to move away from the wall or object. I notice that I primarily occurs in third person perspective, but then again i don't play first person perspective much. Anyone else run into this issue. I feel like it may be related to the clipping/collision detection issue that occurs with flares/glowsticks.