As your social media emotions go viral, anger spreads the fastest[ Tue, 17 Sep 2013 21:53:21 GMT ]When old-timey villagers in monster movies grab their pitchforks and torches and gather in the town square, it's almost never a spontaneous expression of joy. Nope, the emotion these townsfolk organically spread, all the way to that spooky castle at the edge of town, is anger.