the sort that would make you want to kill yourself, or others.
couple of examples
tube/underground workers - no daylight for 8-10 hours. fuck that shit, maaaan.
security guards - either chumps who stand in Tesco doorway and never have anything to do, or even worse, those poor bastards who guard (watch a broken monitor) an industrial estate during the wee small hours.
btw, sorry if any of you do the above examples. no offence meant.