This happened to me 30+ years ago. Some meat wholesaler in Jersey City. I was told 8 am appointment, get there to find out FCFS, so I was the last truck. They only allowed the lumpers yo work 2 trucks per day, and they were used up by the time it was my turn.
You can unload a full load of boxed beef in less than an hour, by yourself. It wasn't fun, but it got done.