Bullet-time is a special ability that allows the user to perceive time at a slower pace, which makes it easier to perform combat maneuvers that would otherwise be difficult. It is also used as a visual effect. It has been shown that it slows down time to the point that muzzle flash can clearly be seen fading away. It is usually dignified to be used by the screen being given a red tint. The concept originated from the 1999 film, The Matrix. In Arena Combat Mode, perks can be unlocked that can make bullet-time more efficient, e.g. retaining your normal movement speed.