Can you predict the next viral video craze?

The one thing we can be grateful for is that the advertisers, manipulators, and marketers aren’t the expert traffickers in human emotion they think they are — nobody can predict next week’s viral video, writes Clodagh Finn.

I can't be alone in this. Every time I hear that something has gone ‘viral’, I can’t help imagining some sort of catastrophe — a highly infectious virus has unleashed its contagion and we have only 14 hours to save the Earth.

It turns out, however, that the reality could be far worse.