User blog comment:JusTiin Cas3/Custom Perk-a-cola's/@comment-3330608-20110510023612

Shot of Vrill- only spawns when a player has the VR11, gives the VR11 the ability to turn zombies into human friendlies. Pro version- only if the player has a ray gun, thunder gun, etc., it makes these guns have the ability to turn zombies into humans too.