Here at HowStuffWorks.com we're putting together a bunch of articles on happiness, which makes me all yellow smiley face. It looks like I'm jaundiced here I'm so happy. I'm writing a some of the articles in the happiness suite and there's this weird thing that keeps popping up, laughing rats. Not just in congruous articles either -- laughing rats were coming at me from all angles! Run for your life, yellow boy! Run!