I am not salaried, nor am I paid hourly, I am actually paid on a day rate. Most jobs, I work at 12 hour shift, and sometimes I am alone, and required to work 24 hours a day. The pay is the same, no matter how much I work.
Most of the time, my job is easy, and I get to play on the internet/watch TV most of the day, but that is punctuated by some days of shear stress. I never get OT, I am just required to do the job that needs to be done.