halotosis

An afterimage type of alteration to your visual and balance processing caused by many hours staring intently at the Halo video game screen, jacked on adrenaline but barely moving your body except for your twitching fingers, navigating through dark alien-infested tunnels with a weird purplish flashlight mounted on the helmet of a wobbly android war machine that you operate via the clumsy X-Y-Z axis joystick interface...distorts your senses when walking and driving after, especially in the dark at 2am when the battle is finally put on pause...save game for later.