I saw a mountain lion in Sonora Mexico but by the time I yelled for everyone else to look he was gone. We were hunting mule deer so it was no great loss.
I've seen quite a few black bear myself. I awakened to one in my campsite once that was a very large light-cinnamon colored one that looked a bit like a grizzly at first glance (there's a small population of them in the northern Cascades here in Washington State). It didn't seem as afraid of me as most of the other black bear I've encountered and that made me a bit nervous, but it eventually ran off. Viewing wildlife has always delighted me.