Brumak Roar: This is How they do it?

CliffyB, probable father to dude of all dudes Nathan Drake, posted a link on his twitter of a video showcasing a motion capture take for his upcoming title, Gears of War 3. See it below:

It’s a mocap for the Brumak, and it’s “menacing” roar. Now, I don’t know about you, but I had no idea that they actually built the monsters in real life and mocapped for the game! That’s insane. And it seems as if they make the monsters to scale, too, because that Brumak is pretty large.  I wonder what they do with the props afterwards? Do they have a room that’s full of those things? And how big will  the tentacle monsters be? Here’s hoping Cliffy releases a video to that too, dubs and all.