Nature is awesome, and brutal sometimes. I love watching nature stuff on TV, but my wife gives me shit about it. She doesn't like watching animals attacking and eating each other. That's fair; they do tend to include at least one or two sequences of that in just about any study of an animal, because that's part of its life and survival.
That vid with the eagles pulling the mountain goats off the cliffs is pretty horrible, though, I'll admit. You can practically hear the goats thinking "What the fuck? Let go of my leggggggggg...... !"