Explosive zombies are types of zombies that explodes, and are weak as well. It has a red appearance, similar to that of the Lava Zombies, but has no lava texture. Upon the death of an explosive zombie, it will explode, damaging surrounding players. Though they are relatively easy to kill, it is advised to use guns instead of knifes against explosive zombies or you'll die easily.
Its too bad that we never get to hear the "kaboosh" sound that they must make, for they are silent, which makes them sneaky in close encounters.