The Fence Chant

A man is walking down the street alongside a tall construction fence. He hears a quiet voice from the other side chanting, "Twelve... Twelve... Twelve..."

Curious, he looks for a gap in the fence. He finds a knothole and peeks through. Suddenly, a stick pokes him in the eye! As he reels back in pain, he hears the voice chant, "Thirteen... Thirteen... Thirteen..."