The backpack could still be held by the man in the black jacket and white hat (the one that is circled in red in the photo you posted).
His back got tired so he took the pack off and now he is holding it by its top strap with both of his hands centered in front of him.
The lady in front of him wearing the big black sunglasses and wearing her black hair in a bun is blocking the view of the backpack.
What else do we know aside from the two pictures of these guys?