Check out this great Craigslist post about questions that get asked during law firm interviews. Here's my favorite:

Why did you go to law school?

What I said: I went to law school because I want to be able to make a difference. Legal work allows me to be competitive and to work for justice, both of which are important things in my life.

What I thought: That's a good question, and I ask myself it daily. I'd have to say the answer is, stupidity.