Stress
Here, again, we look at extreme opposites. You can easily imagine the kind of stress the Blackwater-types might run into, with maybe getting shot at and all. And the travel. And the hours. And the maybe getting shot at. And the strange countries and challenging climates. And the maybe getting shot at. And the top-shelf egos they may have to put up with from VIPs they're protecting. And the maybe getting shot at. There could possibly be just the slightest chance that they might experience a little bit of stress once in a while.
On the other end of the scale, you still wouldn't believe the stress. Trying to stay awake for eight to twelve hours at a time and having to occasionally do something really, really physical, like chew food. Only being able to watch the NBA finals on that old, static-riddled TV set the bank leaves on at night for the guards. Eating vending machine food. These are serious challenges we're talking about.