Okay, let us begin by acknowledging that stepping in dog poop is, objectively, a really, really bad experience, and we totally feel for this little kid who had that happen to him. But his reaction was just so entertaining.
You can hear his howling from across the backyard, and then as the camera gets closer, you can hear him yelling, "I NEED PAPER TOWELS." The child, who, it should be noted, is sporting a t-shirt that says "YOU DON'T KNOW ME,'" wails something like, "I'm not so excited!"
Also, please note that the alleged pooper, who appears to be a pug, is just silently watching the drama unfold from the safety of the deck.