Kate took Stephanie down one level, and straight towards the back of the tower. As most buildings went, there were always neighboring buildings. Kicking out a window, she grabbed one of the hand guns which wasn't a hand gun at all but a grappling hook.
"This should be elementary for you." Shooting it across, it broke the window across the alley way and latched onto the inside. The people at the other end screamed as they weren't expecting it, but Kate and Steph were over in no time, somehow managing to doge a hailstorm of bullets. Taking the stairs all the way to the lower level, they exited the back of the building and disappeared into one of the many back doors presented in the alley.