Shellshock

Shellshock is a state of reduced reaction time, blurred vision, and muffled hearing due to a nearby explosion.

Appearances
Shellshock appears in Call of Duty and Call of Duty 2 when the player is nearly hit by artillery, and lasts anywhere from five to ten seconds. In Call of Duty 4: Modern Warfare and Call of Duty: Modern Warfare 2, shellshock occurs when a Stealth Bomber flies overhead without killing the player. This will also last anywhere from five to ten seconds