Unreal shit. The way it moves...jesus. I don't think they mention this in the video but the engine placement looks like they stole the concept from the A-10 and made them extremely hard to hit. Look at how much METAL gets in your way if you try to shoot at those engines from the ground. Two engines + two rotors = redundancy, plus this is the only helicopter with pilot ejection seats. What a beast. I bet they take a lot less time to manufacture than a jet and Russia can probably crank them out like nobody's business.

(http://www.autoadmit.com/thread.php?thread_id=5353256&forum_id=2#46409505)