He was rushing the kicker....then probbaly just hung back in case there was a return. Holt was a monster on special teams, he had a knack for blocking kicks....was a good pick up for the Cowboys at the time.
In the case of a return he want to be in the action helping spring the return man, not 40 yards downfield hoping the return gets that far. In other words he would try create an opportunity to make an impact rather than hang back hoping he gets luck and an opportunity falls in his lap.