“Thirteen! Thirteen! Thirteen!!!”

A guy’s walking past an asylum, and can hear all the inmates inside screaming at the top of their lungs, “Thirteen! Thirteen! Thirteen!!!”. He peeks through a hole in the fence to see what all the commotion is about, and a finger suddenly pops out and jabs him in the eye. He yells in pain, and the inmates all start gleefully shouting, “Fourteen! Fourteen! Fourteen!!!”.