Thunderbolt writes: "Here's a puzzle for you: I have one ballpoint pen (black), five sheets of A4 paper and the calculator application from my mobile phone open. What am I doing? Am I taking a maths exam? Physics or chemistry perchance? Maybe I'm organising my bills the night before I'm supposed to send them off. Or possibly working out measurements for a new bathroom sink? None of the above: I'm playing Professor Layton and the Curious village on my Nintendo DS. Actually, "playing" is the wrong word; it implies some kind of choice and control. No: I'm completely and helplessly hooked to Professor Layton and the world that surrounds him and me".