Autistic Zombie Apocalypse

Alright listen up, buttercup. The joke is that a group of autistic kids is compared to a zombie apocalypse. Because, you know, zombies are a horde of people who act differently and make strange noises. It's funny because it is making fun of autistic kids who, according to you, act like zombies. I hope you are proud of yourself. Here's a fun fact about you: you probably struggle to open doors, which explains why you are so slow to get this joke. Sad!