WE’VE LONG SUSPECTED that laughter is contagious – if only because some people look so ridiculous when they laugh. Then we saw this video, which seems to prove it.

As part of Berlin’s Laughter Project, one commuter decided they’d start to laugh simply for laughter’s sake. The hilarity of the random laugh gets another commuter laughing… who, in turn, prompts even more. giggles.

Watch and love. And laugh, obviously.