What is the meaning of dream (that is a premonition) in your dream?

I had a dream that I was dreaming. There was a man in my dream that I had never met or seen before. Then the doorbell rang and I woke up to answer the door, but I am still dreaming at this point. As I answered the door, the man that was in the dream was at the door. He was a predator that tried to gain my trust, and did. In the end, I was able to get away unharmed, but when I woke up the most interesting thing about the dream was the premonition that occurred in the beginning of the dream. Any thoughts on what this might mean?