Apparently some of you don't know what a "fast sling" exercise looks like! It sure works, but if you "captured" the frame-to-frame workings, it looks downright awkward in some of the stages. In combat, you don't want to merely toss your rifle away just because you've run out of ammo. The "fast sling" is used for safely and quickly diagonal-slinging the rifle before transitioning to the pistol....even at a full run!