Fast Zombie

Fast zombies are a zombie archtype of medium rarity that can appear in every mission type in the game, although the quantites vary.

Appearence
Fast zombies are easy to spot for three reasons:
 * 1) They have clearly visible blue shirts, a colour that no other zombie is wearing (apart from cop zombies, who are a much darker shade of blue).
 * 2) They move much faster than regular zombies and will normally reach the front of the horde before you are in biting range.
 * 3) They can approach from unusual angles, such as from above (jumping from buildings) or below (climing up buildings).

Attack Patterns
As with regular zombies, fast zombies will claw at any survivors (either players or AI controlled) until they either move out of range, target another survivor, kill their target or are killed themselves. However, when they are futher away, fast zombies can leap towards their target: for players this will cause slight damage and knockback, but AI survivors will be pinned down and potentially clawed to death by their attacker unless saved.

When fast zombies are too far away to see anything, they will stand, crouch or lie still and wait for something to cross their path. When they spot a potential victim, they will run or crawl at a faster pace than other types of zombie.

Trivia

 * The pounce attack that the fast zombies can perform may be a reference or homage to the Left 4 Dead series, in which the Hunter class of special infected can pounce on players and continually damage the helpless victim until, and if, their teammates save them.
 * In addition to the above, Hunters also wear mainly blue clothing (although in that case, they wear a hooded sweater).
 * The leap attack may be a reference to the Half-Life series, specifically Half-Life 2 and onwards, in which the fast zombies can launch themselves at the player and strike them on collision.