I worked at a warehouse for a while. My daily job was to load/unload goods to/from containers. Actually it was not as hard as it sounded like, as generally the goods were not heavy and I could manage by myself. The only thing that troubled me was the air. It was usually dirty inside the container and the ventilation was not very good. So now and then I would sneak near the door where there was usually some leak to let the fresh air in. Only when the supervisor didn't see me.
Or he would say,\"Go back to work.\" And I knew that I didn't even have the freedom of getting more fresh air.