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.