Adds a three-second cooldown to the alien hunter pounce

Does as the name implies. I was inspired to make this after a round on Sybil in which one alien hunter knocked down an entire deathsquad. Pounce is still viable, but far less spammy.

In addition, you are put out of leap mode as soon as you land. Since you can no longer leap many times consecutively, there would only be dead time in turning off leap mode.
grab WJ, he does 90% of the alien stuff including the UI