Castiel has rarely, if ever, ran as a human. Dean's training for him primarily consisted of strength and precision exercises and it's not until he's tearing out of the apartment that he finds himself glad for his vessel's light weight and relatively long stride.

He skids into the alley, mind flashing back to a rainy night almost a year ago before he stops just short of Dean, collapsing to his knees as he reaches out a trembling hand to rest on Dean's chest. "Hospital," he gasps, fumbling for his phone. "Hospital, Dean."