So, watched it... aside from him generally being a prat and running round like he's on the set of GI Joe, I understand completely why there have been complaints.
Notice he is in the caves ill-equipped... no helmet for big bad Bear... hand-held torch... and thats before you get into entering a cave system like that when the water is obviously coming in at a rate.
Only been trapped once whilst caving and it was due to poor equipment. We'd been lowered into a bell cave, two of us... realised the rope wasn't up to speed, so rashly the guys at the top cut the rope thinking they had a replacement. They didn't, it was nowhere near long enough. To make matters worse it started raining heavily in the time it took the guys to drive back, get a rope long enough and get back. My mate and I sat tight, water rising slowly until they got back... up and out, didn't go caving again for months.
So Mr Bear doing his thing, all very well... but he should have at the very least been wearing a helmet, not only when in the cave system, but also when he was gorge walking.
The man is a 110% prat, won't take another word he says seriously (although admittedly I was already over that side of the fence after seeing him jump blind into a rock pool on another programme)