I think it’s a defense mechanism produced to avoid shock or trauma. When I was little, this old dude died of a heart attack, and not quite understanding what death was, or at least what it meant for the majority at that point, I started laughing when I saw his corpse.
I think laughing during such occurrences is like carrying a fish in a plastic bag until you get it safe in its aquarium.
There’s also the idea that these kinds of television shows are set up so that most of what is disturbing is removed or edited. I see plenty of these shows where, by all rights, someone should be dismembered, or bleeding all over the place, but they never are, or never film it. So what’s left after that? Just some ridiculous looking crash…as well, most of these shows, at least American ones, will only show accidents and such that people got out of…it might be relief laughter.
I wasn’t laughing while watching Faces of Death, even if apparently, it’s all fake.
In real life it’s also extremely different, The contrast between reality and entertainment is evident, whether what you see on TV is real or not. And with the profession you have, I’m sure you know that better than I do.
Or, perhaps YOU don’t laugh because you’ve seen this first hand plenty of times?
But, as for the TV shows; it remains that they’re made to be watchable. In real life it’s always funny if the person isn’t seriously hurt; but if they got a tire iron sticking out of their sides, it’s usually more omfg and panicky.