Former UFC champion Ronda Rousey has a pretty serious face. It comes with the territory when your job is to punch, kick and slam other people who want something you have. She's faced off with women her entire career who gave her the same serious stare back before it was time to fight. But when it comes to a piece of Twizzlers in her face, she can't help but laugh. Not even "Rowdy" Ronda can keep a straight face.