Mack Hollins brings back 'Backpack Kid Dance' at 76ers game Posted Mar 28, 2018 Sure, fans were cheering the return of Markelle Fultz to the court on Monday night at the Philadelphia 76ers game. But there was another return that had the crowd on the foot. It was the return of Philadelphia Eagles wide receiver Mack Hollins' 'Backpack Kid Dance.' The Super Bowl Champion broke out the dance move during a break in the action. (WPVI)