After i have played the game for a while i have noticed something odd. When the watching the debut trailer(can be found here http://www.youtube.com/watch?v=Nfw3aml0Sss) I have noticed this grapple kind of animation that the assault does at 1:07. I have seen it in other trailers but have never seen it in gameplay. Is there some way to preform it or is it just apart of the trailer as an animation? Please reply back