I had dream I was riding an elevator towards the rooftop, while chasing somebody at the same time?

I believe in the esoteric explanation, which would be: you are rising in your awareness/consciousness. At the same time you are "chasing" the bad/unpleasant things from your life and you are doing it selflessly and with force. (you used a gun, you were trying to rescue a hostage by putting yourself in a dangerous position) Rising with the elevator could mean your astral body rising in the astral spheres. In other words - your thoughts are probably that of a better man, that were before.