Actually the guy on the left is wearing his wrong. Based just on the visual it seems both are left handed, therefore you would want the arm and shoulder free of any impediment, so the strap would go on the non dominant side.
Unless this is showing how lame Monty is, the theory he is trying to explain is wrong. Its not Heisenberg its the theory of schrodinger’s cat. I’m a geek I know
Actually the guy on the left is wearing his wrong. Based just on the visual it seems both are left handed, therefore you would want the arm and shoulder free of any impediment, so the strap would go on the non dominant side.