Early on Tuesday morning—on my way to work in Center City Philadelphia for the first time in 12 days, after a magical homecoming tour of Southern Appalachia, feeling fresh and grateful, wearing my brand new Dansko clogs from Discount Shoes on Brevard Road in Asheville—I walked past the abandoned PATCO subway entrance (which I lovingly call the The Hellmouth, for reasons) and I stepped sideways on a piece of broken glass.