It will keep on hopping towards and it will "throw" itself at the player, dealing slight damage. Keep your attention to the ground when on levels containing this enemy because it is much smaller than you.
It is normally a "decapitated" head from an Injured Zombie.
- It could be the Headless Injured Zombie's head.
- Oddly, with anything but a sniper weapon, it shows players can't get a headshot on it.
- It is similar to the Slime.