The wind was a constant roar in my ears, the kind of sound that made me feel alive. I wasn't just running; I was flowing. To anyone on the street level, I was probably just a blur of fabric and motion, but up here, among the jagged skylines and rusting pipes, I was in my element. I launched myself off a ventilation duct, my legs acting like coiled springs as I cleared a ten-foot gap between rooftops with room to spare.