Yeah, I like the idea, but it is hard to tell that it's supposed to be speech or thought instead of labels. Maybe if the lines to the words seemed to be coming out of the areas where their mouths would be? Otherwise, I'm not sure how to indicate it better without speech or though bubbles.
How do people not understand they're speaking towards each other? Haven't people seen these kinds of "you rock!" (said at a rock) "you rule!" (said at a ruler) jokes before to get the gist? lol.
Wonderful twist of this familiar joke, very unexpected descriptions.
About my design