JarZman

When you die at the hands of a zombie, i.e being hit to death/infected etc you have the choice to spawn back in as a zombie. Or prehaps just anytime you die. Just a normal zombie that has all the same traits as the AI zombies (die easy, run faster, no hunger or thirst) Mostly just a gimmick to give you a break to relax after losing all the epic loots. Maybe when a zombie you can "smell" surviors. Be it a range indicator or an on screen alert when your within a certain distance. Would make things just a little more interesting not knowing when a player controlled zed is going to storm into the building your in.

edit. Wrong theard..