Shit. He was running. Not good.

She was on her feet and after him less than a heartbeat later, jumping over the guardrail and skipping half the steps on her way into the subway. God this guy was fast. He was almost out of sight around the nearest corner by the time she got going again, and when she rounded the next corner all she caught was the tail of his coat as he swerved around the next one. 

When she made it to the subway platform two flights of stairs and only a few seconds later, the place looked deserted. No sign of her quarry except for the scent he left behind. She couldn't hear any trains either, or footsteps pounding down the tunnel, so he was still on the platform somewhere. Probably behind one of those shiny pillars. Or inside a trash can. Or crouching behind the drop to the actual tracks from the platform she was standing on. She decided to check that first. She walked over to the edge cautiously, then leaned slightly over and looked both ways.

"Marco..."