I know that many complain on these guys overreacting or acting poorly, but that shouldn't be the point here. There is no such thing like a serious research on pain with just 2 subjects being tested.
This show is for fun - to see different kinds of animals and the way they can hurt people. Of course that dialogues and setting is somewhat staged, it's always the case, but these guys REALLY get bitten, and for our entertainment.
Just look at the episode 8 and how the python messed them up.
The fact that somebody else did the similar thing doesn't mean much. It's hard to even think of something nobody did, that could be a good material for a show.
These guys deserve respect and I really hope we are getting season 2.
I would love to see more and mooooooooore new nightmare creatures doing their job.