Per video analysis: Axial loading injury, presumably to thoracic spine. Will need thorough neurological exam, followed by emergent imaging studies. Surgery may be indicated for unstable injury, or canal/spinal cord involvement. He will take an ambulance now (I don’t know about capabilities at that stadium) on the way to a trauma center. All NFL teams have a emergency action plan in place, with EMS personnel on site, exactly for catastrophic injury cases like this.