We used to move loaded racks of graphite tubes through the air at the graphite plant to the next dept. or for storage. Careless people who were tired from working doubles or just not paying attention, sooner or later would hit the crane stops at the very end of the building or even the second crane traveling the same crane rails in the next dept. The whole building got cleaned from the hit!
I bet they don't let rookies do that move with that kind of weight involved.
