Your Head

“Hey, stop hitting my head!” I yelled at Natalie.
“But it’s so fascinating,” she stuck out her lower lips, “every time I hit your head,” she hit my head again, “there’s this cool hollow sound!”
I exaggerated ‘the look of understanding’ on my face and whacked her as hard as I could on her head, “Oh, did you hear that? I think I heard echoes!”