Watch this short film about a contagious laughter that spreads throughout a subway train crowded with sullen strangers.
Called Bodhisattva in the Metro, the fun begins when a man enters the subway car filled with gloomy silent commuters, but begins to giggle — then laugh — out loud. The chuckles spread from one person to the next until everyone was slapping their knees glee.
(Thanks to Mary E. for sending the link!)