Nice piece from philosopher Alain de Botton in today's Guardian about the things he learnt while being writer-in-residence at London Heathrow airport.
I particularly liked point #2
2 There's a British Airways check-in employee at Terminal 5 who, if you manage to be especially rude to her, will pretend that her machine has suddenly designated you for an upgrade. Then, just as she observes your scowl turn into a deferential smile, she will take a second look at her screen, sigh empathetically and announce that sadly the system has mysterious changed its mind and there won't be an upgrade after all. "That's a lesson that normally lasts a lifetime," she reckons.