Pain is rarely humorous except when it is truly a Kharmic payback from whatever force controls such things (or not). If you cannot laugh, you will burnout and beat your wife, drink too much or become overly religious (haha) which are all potentially bad things..
Folks in the emergency services get to see and do things that others never get to see or do, and you either love it or hate it. If you hate it get out- it will kill you if you don't.
Laughing at tragedy, it happens. thanks commstar your comments reminded me of a story that I'd like to share for the benifit of matthewpd.
I remember a day, way back when I was in Law Enforcement, I responded to an aircraft crash.
I was off-duty at the time, small Airport Police Department, there had been a small private plane that had made contact with the Air Traffic Control Tower and declared an In-Flight Emergency. Moments later it disappeared from radar. I was sent in one direction to look for the possible location while the Airport Manager was sent in another direction.
About 10 miles from the airport I arrived at a location where there were local VFD personnel that were already on scene of the crash. As we approached the scene there were no signs or sounds of life and upon looking at the wreckage it looked like there was no way there could be any survivors. At the time we weren't sure of just how many people may have been onboard but you know that there had to be at least one, the pilot. However we did notice that in the trees above our heads were what looked like strands of human flesh and remains.
You still have to go on or in a rescue mode though and once the pieces of the aircraft were being moved we noticed the tops of two heads. So, now we know that there was at least two persons aboard and again the chances of survivors went down drastically. Once more parts of the wreckage were moved and we went into a recovery mode the remains of the two individuals were picked up piece by piece by piece.
You couldn't tell which piece went to which body and with the strands of remains in the trees above our heads I heard one of the persons on scene make a comment sort of like this, "Well at least the critters will eat good tonight."
Now while that seems uncaring, unsympathetic, and quite cold it was quite humorous at the time. On scene we all had a job to do and we all did it well and to the best of our abilities. It was later that night that I was all alone in my apartment and was thinking about what I had done that day and I just broke down crying and wondering about what might have been the last thoughts of the two men that were killed. It turned out that they were future Father-In-Law/Son-In-Law. And so while this terrible tragedy affected the two families directly and those on scene as well the comic relief was needed to maintain our sanity.
So yes, you may very well hear a dispatcher laughing or see a couple of those first responders/rescue personnel smiling at the scene of something very violent and disturbing. Until you've been there and done that you won't understand.