I got one for yall that I've actually experiannced.
I live on the edge of a canyon, and down in it you can sometimes hear howling and cackling, like from a hyena. So I asked if there were any animals living down there, and my mum informed me there used to be a pack of coyotes down there. Got exterminated two years back though. But! Animals keep on turning up rippped up and eaten near the edge of the canyon. So I asked around at the animal control. They say they keep a patrol in the area because they don't want the coyotes coming back. So what's killing the deer and such? WELL! The Nana decided to investigate! I went down there and found a couple of caves! Found nothing. Kept searching all up and down the damn place and found nothing at all. So I'm heading home and it's evening by now. I hear something behind me and start freaking out, because I'm in a canyon, it's getting dark, I'm hearing dark noises... I whip out my throwing knife (eight inch, straight blade, double edge, solid black, yum) and turn around. Nothing. I fucking hate that. It was like a monster movie. I start slinking back to the house and keep hearing shit moving, and I turn around again. Nothing, but this time I hear like... a hyena cackling. I was freaked out again. I'm in Texas, there aren't hyenas here. I keep myself from running and keep walking. I hear the cackling behind me, and see something slink around a big rock. Looked liek the back end of an animal. I'm pissed now, so I turn around, back in the direction of my house, and I see this big grey coyote run across the path. I take off running, and as I'm hopping the fence into my yard, I hear the cackling again, sounds like it's coming from a bunch of different ones behind me, so I dive in through the screen and slam the door shut. I don't go down in the canyon now. Fucking ghost coyotes. Freaky shit.