He then slides onto Patrick, grabbing the box] Good old secret box. He gets ready to reach for the box, but Patrick takes the box before SpongeBob could grab it. But what SpongeBob didn’t know is that, when the string is pulled, a secret compartment opens and reveals something truly embarrassing for SpongeBob. Let's see what's inside. Patrick eventually shows SpongeBob what’s in the box: a piece of string.