Just my cat. I have two. Occasionally, I take them in the backyard. The young one loves it, but I don't trust him, so he's on a harness and leash. The old one is so slow, I don't have to worry about leashing him. But, one afternoon he wandered a little farther than I would like, so I went and picked him up. To express his displeasure, he hissed at me. The young one flew himself at my leg. So then I'm trying to wrangle the two cats back to the house, meanwhile my leg is dripping blood. We get inside and they wander off like nothing has happened. We had sensed that the younger one considered himself the older one's protector, but didn't have real proof until that happened.
However, there was one time I feared a dog attack. I went out for a walk, and there was an unleashed dog, and he just started barking and came out into the middle of the street. The look he had, I had never seen in a dog. I stopped and he continued growling and barking, I was going to start stepping backward, since I wasn't that far from my house. I was not going to turn my back on him. But a woman in an SUV came by, saw the dog, and he wouldn't move for her car until she got right behind him. She rolled down the window and asked if I wanted a ride, and normally I would shrug it off, but I got in the car. She said she never saw anything like the way he was acting either.