"By now I'm thumping through the Ikea and Tescos. I don't seem to have noticed the past two miles. But it doesn't matter. It doesn't matter that I'm injured. It doesn't matter that I'm stuck in the city. I feel reconciled in my particles of flesh, my molecules of sinew. I know what to answer. My trainers pound the tarmac in a familiar mantra: I'm a climber, I'm a climber, I'm a climber."