In reply to Audible.co.uk: I recently sustained a terrible injury while soloing on Mt Stanage, listening to Steve Jobs' biography. While riveted by this tale of intrigue and ingenuity in the heart of silicon valley I was distracted by a description of an early mac prototype and my foot slipped, landing me on my arse at the bottom of a technical and exposed mod. My coccyx has been sore and bruised since then, making some other favourite activities painful.
My advice to you, reader, is not to try tech 2 moves while listening to an audiobook, lest you too pay for your fast living. You might not be as lucky as I.