It's an unusually sunny Saturday afternoon in Battersea Park, and I am taking deep breaths to stop myself from hyperventilating. I have just dropped my iPhone. My uninsured life support, with a not-too-shabby price tag of £600, has transformed into a pile of broken glass and chipped plastic mixed amongst gravel on the pavement. Someone might as well have just hit me. Did I really just say that? Yes, yes I did.