Travelling on Friday evening from Stuttgart to Villach, Austria, there were no seats free in any of the train carriages, so I joined a few other passengers on the floor. It wasn’t as bad as it sounds, really – the trains in Germany are fairly clean and the floor is carpeted, at least I didn’t have to worry about my derrière getting sore. An hour or so later, I realised, happily, that sitting on the floor was, in many ways, better than sitting up there on the seats. I could stretch out my long legs completely and adjust my sitting position to my liking. I could also observe my fellow passengers unobtrusively and from a different angle — how interesting it is to observe humans when they don’t know they are being watched!