NOBODY sprints while simultaneously holding a transistor radio up to their ear/alongside their head. NOBODY sprints with their hand steadfastly held at head level period. What we are seeing is a completely unnatural physical act occurring during someone Hauling Arse. That guy is on-the-lamb while simultaneously listening for instructions. Plus, he is the Only person inside Dealey Plaza sprinting East immediately after the Kill Shot. The Bright Glint we see from his (R) Hand is also a concern.