I used to work for a company that installed movie projectors/equipment - it was fun and interesting, always something new & interesting to deal with. The guys that actually ran the equipment on a regular basis got paid the same as we did, so I figured it'd be easy and so I tried that for a while. It was HELL. You go in, set up, push the start button, and then there is nothing to do for hours/days - if the everything is in good condition. Then just as you are totally zoned out, something breaks and you have to frantically fix it while tons of people are screaming at you.
I was so bored that I used to break things on purpose just so that I would have something to do. Needless to say, I didn't last at that job.