Bad Guy Face

I noticed Leif making this face a lot today. It was mostly when he was fighting off pretend bad guys in the yard. So, I followed him around and got him to show me his "bad guy face".
Me: "Wow, that face would scare away some bad guys."
Leif: "Oh, that's not how I would scare away the bad guys."
Me: "Oh really, how would you?"
Leif: "Well, I'd just kill the first one, and the rest would just run away."