I worked in a furniture manufacturer as summer help for two years in college. Basically, 8 hours a day, 30 minute lunch, 10-min break. And, usually lots of overtime, so I would work Saturdays and maybe Sundays (when available(.
My first year was in the box packing line, putting parts in boxes, or when necessary, stacking the filled boxes on pallets for shipping. The plant was often behind on orders due to part mixups, breakage, etc, so my line manager would usually turn the speed of the line up to ludicrous speed. That made it hell, no matter what part of the line you were on.
AND, if someone was sick that day, everyone else made up for that person. I remember one day we had 3 people missing from a 12-person line.
One time I was grabbing parts for my spot in the line, when a guy driving a forklift with a dumpster on the front hit me. Knocked me into another pallet of parts, left me woozy. I think he lost his job.
I used to have nightmares about the line for a couple years after I graduated college.
The second year I worked in the parts area of the plant, where the saws cut up the wood into the parts necessary for the line to pack. If we went down, so did lines, so you didn't got down unless a blade broke, or someone died (j/k).
Stacking those parts, wearing thick gloves to avoid being cut, all in summer temps of 90 degrees and indoor temps of over 100+ (even with fans)...it sucked. One day, I dropped a load of parts down my front, where the razor edges proceeded to gash me from mid-thing to shin.
I didn't have nightmares about the parts job so much, but still tough, repetitive, monotonous work.
Showed me that finishing college was what needed to happen.