Suggested by Shaker Alittletiefling: "What is the coolest/scariest/most interesting encounter you've had with a wild animal (outside a zoo or other manufactured experience)?"
I've also a few interesting experiences with wild animals—seeing a herd of wild mustang, making friends with a possum who learned to hang out on my back porch at dinnertime for a tasty treat, countless funny interactions with curious squirrels—but the best thing I've ever seen in my life has got to be the buffalo who was holding up traffic by taking a nap in the middle of the road at Yellowstone, until some impatient asshole in an RV decided to nudge him with his front bumper. The buffalo got up, turned toward him, and ran head-on into the dude's grill, completely destroying it. Then he snorted and sauntered away.
It was awesome. And everyone in the line of cars on either side applauded wildly for the buffalo.