There are these stupid owls around here which make heavy breathing monster noises, you know like Darth Vader. It sounds like some big horrible monster stalking you in the bushes.
They make the breathing out noise about every 5 seconds as their mating call or whatever.
I've had one of them harass me when out alone. Luckily I already knew what it was after dealing with one on my fence at home (when I had the dog and cat as backup ).
But if I didn't already know they were "ghoul owls" (I don't know what sort, that's what I have named them) I would have done a runner out of there