"vaako" said ...Hmmm. I don't recall any bones for moving that, move the pelvis? Didn't get the second part about pop and lock. But I just know my miranda is doing pushups. lol. Yea, I used the map's lighting.
Well it looks like her ass is frozen in the air, it doesn't move throughout the entire animation. Everyone's movement is very stiff and robotic, Sheperd's wrists are breaking every time he thrusts, you're getting a bunch of IK pop and lock from overextending the extremities from the body. I'm also going to assume that isn't your final lighting, because it's very flat.