A: Are you taking karate classes? B: Yes, I just started last week. A: That's so cool! B: It's a lot of hard work! A: Are you training to be like Bruce Lee? B: No, I'm just learning some self-defense. A: Oh, you mean like blocking hits and stuff? B: Yes. I want to be able to defend myself. A: That's pretty impressive. B: I've learned a few skills already. A: Remind me never to mess with you! B: Don't worry; I'd only use my skills when necessary.