He's throwing punches...it's not running. Lateral movement is not the same as running backwards, either. Cory Spinks = runner. He never takes a step forward and is ALWAYS going backwards. Hill was just using lateral movement to keep his man from setting up power shots.
Hill was throwing virtually non-stop punches. If a guy is coordinated enough to move his feet AND his hands, that doesn't bother me. What bothers me is full-on retreat, ala Mayweather-Baldomir's closing rounds.