Boomer Bile:
When a boomer spits/explodes on you, it releases a green slime. This is called Boomer Bile.
It does 20 damage and slows you down. It also emits a greenish slime to cover your screen, leaving you vulnerable to any zombies that hunt you down.
Infection Bar:
A special kind of bar that resembles the sprint meter. This only appears on the objective of Anti-virus or INF game modes. You start off with it on Anti-Virus, but on INF, it shows up when scratched.
Sprint Meter:
The sprint gives you a nice speed boost. You start off with 100 energy, although the straw hat gives you extra.
It really isn't a sprint meter, as it is also used for killing zombies with a baseball bat, crowbar, katana, etc.
Fire:
Fire is something that you do not want to mess with, as it deals heavy damage to enemies, and even you! You would have to be protective with a fire-proof vest or Halloween vest, or as well as a officer vest. You get burnt by these so called Elemental, or by a Molotov.
Ice:
Just like fire, ice is harmful to humans and zombies. As a human, ice usually isn't that effective unless you are on a plane or chased by a hord of zombies. You can prevent yourself from freezing by equipping the Christmas vest or the Ice vest. When you press backspace as a human and you are frozen will cause an automatic reset. You can make a freeze shorter, you can use a flamethrower to thaw yourself. When you are an elemental in ice form, you can press f and use ice to fling the player off the map. The only weapon that contains ice is called an "ice sledge". It is not efficient to use it against a elemental zombie, tank zombie, or bat zombie because it won't freeze any of the mobs, but it can still push them away from you. Using molotovs will NOT thaw you.
Losing Limbs:
It's really rare to have this, as it could only be performed by glitches, or by the explosive tank on New Bloxcoast. Losing leg limbs can also slow you down from climbing up a ramp. If you jump while going up the ramp and you don't have your leg limbs, you will go down the ramp.