Taking a quick break from hockey trophies here. Anyway, up until yesterday, I had lived my life in blissful ignorance of the reason why cats, when frightened or startled, will flatten their ears, spit, and hiss. Like so:
...so I'm really much scarier than a cat, and you should leave me alone."
Ok, perhaps they're not mimicking the Armenian Viper specifically, but you get the idea.
Fez tip to Maru.