The team that brought us that hidden camera footage of Londoners being nice to each other are back, and they've got further proof that not everyone in Britain's capital is completely miserable.
This time they've done it through the medium of dance. In the clip above, a man boards a crowded Circle line train with a microphone and thanks the tube drivers for going back to work after last week's strike, before encouraging the less-than-enthusiastic-looking commuters to get up and dance in celebration.
Surprisingly, quite a few of them do in the end.