VS groups:
"Brawler"
runs toward a single target with blinding speed and throws a bigass punch that sends the unlucky victim flying into the air, vertical impulse 5000-ish. anyone nearby is knocked away, and if there's not enough room to charge he simply slaps people around, similar to the tank
VS people in one place:
"Strider"
instead of walking, the strider takes "hops" toward a victim: short jumps that cover about 12 studs each, 2 seconds inbetween. once it reaches a target, it quickly "scrapes" the area (compare to a typical anime superspeed attack), spawns a quick explosion which disarms everyone nearby (dropping their weapons), does damage, and flies off into the distance to slowly hop back
VS hidden people
"Hopper"
when a player is nearby, the hopper jumps toward it, regardless of whether he can see it or not: if the hopper hits a wall during a hop, he sticks, and tries to hop toward the player again: if he actually hits any players, the player and hopper are both stunned (player, disarmed). this zombie would work well against the second problem as well, since this would force the players to defend their stunned pal (or run like hell)
