Right. When you grab an enemy, you can use them as a human shield as well, throw them through doors so that they get shot at instead of you, or, my personal favorite, throw them like a javelin at other enemies. You can throw over balconies and such too, and every kill is given points. The more points you get, the more upgrades for your weapons you can buy (grenade launchers, silencers, etc.) I took a good deal of pleasure in hiding behind a corner, waiting for an enemy to walk by, grabbing them, and throwing them about 15 stories to their doom.