At close quarters , just the sound is scary .
Swift changes in direction on tiptoes , subtle changes in pace and rhythm responding to his trainer 's drill -- except that his punches land like a wrecking ball hitting a Wall of concrete .
At close quarters , just the sound is scary .
Swift changes in direction on tiptoes , subtle changes in pace and rhythm responding to his trainer 's drill -- except that his punches land like a wrecking ball hitting a Wall of concrete .