1 - Silly & Scary: Friend and I were doing the 8 mile or so rough Subway hike in Zion. Since I was carrying 2 bodies, lenses, tripod etc. and my friend was only carrying a small light DSLR, I asked her to carry all the water we had in the car. She said no problem. Silly me, I didn't visually check. About 3/4 of the way there, we're taking a break and I'm asking her for more water; turns out she only brought 3 bottles total. Stupidly, after some debate (and angry words on my part), we continued going since we were so close. Oh, and she got up late and ate breakfast slowly, so we started hours later than I had planned.
So on the way back, it was getting dark. If you know the Subway hike, we did the climb up the 400' cliff in the dark. We had headlamps, but the climb was still difficult. My friend slipped and almost rolled off the cliff, and I was so dehydrated and exhausted I literally was almost falling asleep on my feet; never been so exhausted in all my life. Had to rest a bunch of times on the way up. We were both thinking we weren't going to make it up to the car, but we did. Barely.
To add insult to injury, the water level in Subway was much higher than normal, so we didn't even get good shots.
2 - Was in Yosemite doing the short hike to lower Yosemite Falls; it's a short, well-traveled paved path, so I was surprised at what happened. I started to hear a rustling noise and looked around. I saw one, then two, then about half a dozen deer bounding through the trees and brush directly at me. I started to smile, thinking how cool the moment was, especially as they zipped by on both sides of me. I'd swear I could have reached out to touch one of them. I was reaching for my camera until I saw WHY they were bounding. A big coyote (wolf?) was chasing them, which made me immediately freeze. Fortunately, the coyote was focused on them and never glanced my way, although it passed within 10 feet of me. I'm not sure what it would have done if it had seen me, but it sure did freak me out for a few moments, especially when I realized I was probably easier prey!