Yep, the unguarded drive belts etc are most probably right. I doubt though there was ever a traveling crane with some poor muppet sitting in a chair that doesn't even have a valid connection to the crane, a single bolt on the front edge at each side?, of a single strap? They would want to have one heck of a lot of torque applied to them to stop that seat from pivoting down and tipping him headfirst onto the ground. And one has to assume it is picking up power from the exposed cable running just above his head each side of the beam which barely clears his head. Fried apprentice for lunch anyone?
