Dreams: Signs or Surreal?

Most of us who know the psychology of dreaming know of Freud's theory of sex symbols in dreams, a theory that we know is false.  Dreams are helpful in recording memories and rejuvenate the brain.   However, some dreams we have (or at least I do) are way too relevant to are lives to just be for recording memories.  I had a dream once that I was going after this girl, and then a friend of mine told me not to.  In the first half of the dream she acted basically how she would in the real world, but in the second half of the dream she was "evil" and tried to run me over with her SUV.  Of course there were other, much weirder parts of the dream that made it unrealistic, but I still don't know.  Was the dream a sign, or was it just a random collection of thoughts?