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I was looking at the board on Der Riese and it said Hyena on one of the board so I looked Hyena acronym on Google and this is what I got

Hypertension
and
Exposure
to
Noise
Near
Airports

This is interesting because of there objectives

* To analyse the exposure-response relationships in adults between long-term exposure to airport related noise and high blood pressure.
* To evaluate the modifying effects of traffic related air pollution (NO2, PM) on noise associated cardiovascular risk factors and cardiovascular disease.
* To analyse the difference in blood pressure resulting from different noise exposure patterns.
* To assess the possible modifying effects by annoyance and sleep disturbances due to road and aircraft noise, on blood pressure.
* To analyse the impact of aircraft and road traffic noise on stress hormone levels.
* To analyse the effects of noise exposure on high blood pressure in susceptible subgroups of the population.
* To provide scientific basis and support for guidelines for a European policy on noise abatement

could also be cos the hellhounds are part hyena?

i like hyenas... i like hounds... !!! I GOT IT!!! the hyhound (high*hound) XD

Good work, that makes sense.

o.o wow treynach dose put in detail nice find!

i think treynarch puts this stuff in to distract us and make us go "Wtf.....?" long enough to get surrounded/killed by the zombies >.<