"I feel like russian bear!"- Nikolai Belinski
This Perk is Called Juggernog. It is found in the zombie game mode. It gives you twice as much health and costs $2500 points. It is found in Multi-Player known as Jugger-naught. Any way it can be helpful when reviving teamates or evading zombies. Here is a better way to describe it.... Without it you die in 2 hits. With it armed it takes 7 long hits to knock you down. Use it when you can.