I cant find any info in the game on this and not many mentions of it on the web. One of the VL perks says that you can power bite someone and it will refill your health if it kills them. However I cant figure out how the hell to power bite. I tried holding the triggers while in melee mode but thats just a power attack.

What am I missing?

when the enemy is low on health hold the attack button and you will bite them in the neck,must be in claw mode though.

and still...its as random as kill cams.. sometimes i get it 5 times ina row, other times i just slap em...

It very subjective to when it happens.

The best chance is to have a guy standing straight up looking DIRECTLY at you.
That gives the best chance for it to happen IMO.

Thanks for info and advice peeps. Much appreciated.

np.
i find the power bite attack to be the most satisfying way to kill someone