A Minecraft Movie has taken the younger generation by storm and blew up over the course of a pretty stellar opening weekend at the box office — and the film’s Chicken Jockey moment is definitely a huge part of that.

Why are kids shouting 'Chicken Jockey' in cinemas? Why are theaters banning rowdy Minecraft fans? And has Jimmy Fallon finally put an end to the madness as the meme hits mainstream TV?

In Minecraft, a Chicken Jockey occurs when any baby zombie mounts a chicken. While it sounds funny, and the movie proved it’s also cute, it can pose some serious issues when the rarity occurs. Chickens are chaotic in that their speed and direction aren’t predictable. Combined with the naturally hostile zombie, they’re a formidable enemy.