A: What are you doing? B: I'm going to change the light bulb. It burnt out. A: What are you standing on? B: A couple of dictionaries and some textbooks. A: Are you crazy? B: What's the matter? A: Those books will slip and you'll fall. B: It's only a couple of feet. A: What if you fall while you're holding the light bulb, and it breaks and pieces go into your eyes? B: I never thought about that. A: You'd be blind for the rest of your life! B: I'll get the stepladder.