My first summer job during college was at a factory that made heavy duty brakes. They put me at a machine that they called a pin splitter. Basically, it was a machine that opened up cotter pins enough that they could be easily opened by hand. You would place the pin in a jig, push two buttons, remove opened pin and repeat. 640 times an hour, 10 hours a day.
About 3 hours into the shift a mentally handicapped woman would come in and sit at the machine next to me. She would do the exact same job that I was doing. My first day, someone in the department was celebrating a birthday and they brought cake for everyone. I'm not sure if the handicapped girl ate it too fast or what but after we went back to work she threw up all over her machine, my machine, herself, me and all the pins we had split.
So, after I finished cleaning up her machine, my machine and our pins... I spent the rest of the day working my mindless job smelling of puke.
Worst day ever. I decided that day to take college more seriously.