The red-and-green highly visible headphones are my protective shield as I walk past barely-shuffling heroin user and the teenage runaways. The song changes to "Lady in Black" and there's a spring in my step. I descend the marble stairs - instead of taking the escalator with its "everyone knows you're high" stickers and the luggage-lugging tourists - and sing along under my breath, a 21st century chorus to an immortalized 1971 version of Uriah Heep.

A short walk on this connecting platform, also marble, and a swipe of the fare card sounds a familiar beep, an announcement to the whole station that I've paid my way, nothing to see here folks. I fly down the stairs, the soles of my shoes barely making contact with the steps. After two or three of these, my feet lift off and I'm leaping, descending past a dozen hard hard marble outcroppings. A voice screams inside my skull, a few beats too late.

I'm falling, the ground is coming up awfully fast, there's a gasp from above but I can't look up, can't look away from the nondescript spot on the floor where I anticipate to make my painful landing.

But I don't fall. The ground isn't flying up to smack me in the face. It was, but then rethought, changed its mind, and receded from me instead.