You and your best friend were in line for the mirror maze at the yearly carnival

You let your friend go first, giving them a moment's headstart before entering yourself.

As soon as you stepped in you noticed the mirror walls banging and shaking, and once you had deemed yourself lost you heard a bloodcurdling scream.

You feel a tap on your shoulder, turning around to be face to face with a man with a bloodied knife, your friend's body lazily tossed over his shoulder and a grin.