People are in danger when around coyotes. Waving your arms, stomping your feet or holding your breath until you turn blue will not help. Coyotes learn quickly.
I had an experience w a pack once. Still can’t believe that they knew what I was doing when I picked up some rocks. Must have had contact w humans before.
I ran into one on a trail about a year ago at the Westwind Barn in Los Altos Hills. He was going the opposite direction from me, maybe 30 ft. away. Scared the daylights out of me. We warily eyed each other, kept our distance, and both moved on. I was thinking “Here I am totally defenseless...no rocks or sticks nearby...what do I do now?” I have mainly kept a sharp eye out for the big cats and not expecting to see coyotes, even though the probability of spotting a coyote is far greater than seeing an elusive cat.