This episode of This American Life about murder will put you in a weird mood. For instance, you might find yourself about to cry in the dairy aisle at the supermarket (not that such a thing happened to me, nosirreebob).
Act Two. The Good Son. - A story about a mother who wants to commit suicide and a son who dutifully helps her do it-even though his mother is a happy, healthy, independent person. How did they manage to pull it off? Practice, practice, practice.