LOL - Very nice! I play Metro almost exclusively and have done that a few times. If you're playing as RU, the US team usually stops on the Red Stairs at B. I just bounce 320 LVG rounds down there where they cluster together. Good times!
You can add me on Battlelog if you like, KublaKhan81.
"To fight and conquer in all your battles is not supreme excellence; supreme excellence consists in breaking the enemy's resistance without fighting." - Sun-Tzu