Woman Laughing At Her Phone Makes Entire Subway Car Laugh

This is either proof of the power of laughter or a prank.

This weirdly funny video of a woman in a subway giggling at something on her phone triggers contagious laughter that takes over the whole car.

It’s entertaining and also kind of creepy, the way people can’t seem to control themselves for a good three minutes.

It’s always possible that this was just a flash mob-style prank and the woman planned all this with her friends beforehand, in which case, c’mon lady, some people just want to go home from work in peace.