When at a far distance >30m, if you shoot a player or a zombie that dies, you do not see any death animation and the character/zombie is stuck running endlessly ignoring all obstacles. If another player kills a zombie and you are right next to him, the player will see the zombie dead but you will see it either walking endlessly or standing still (The last animation the player/zombie did is being done over and over again). Not sure if the following works with players but for zombies at close ranges it does that.