Might I inquire as to what, precisely, a Mustain't is? (Aside from a string of letters I hesitate to Google in that order.)
In October 2014 I went on a road-trip to the Dryest Place In America.
I was having a rough year, very depressed from having dropped out of college for the third time. I decided a road trip was in order to re-set my brain and get a little distance. Being that it was October, and therefore all the campgrounds in the American Southwest were filled with people who have the good sense to camp in reasonable temperatures, I elected to take my parent's minivan so I could car-camp anywhere suitably isolated, and looked up some of the southwest's geographic extremes- the highest place I could drive to (Pikes Peak), the lowest place (Badwater Basin), and for fun, the Dryest Place in the continental US, which turned out to be the Pinacate Volcanic field just west of Organ Pipe Cactus National Monument. It gets rain maybe twice a century and has no standing water, despite being less than 100 miles from the gulf of California.
It's a startlingly beautiful and alien place. The ground is a deep chocolate brown to black volcanic sand, and in mid October, the rabbit brush is turning bright yellow as it shifts to autumn, the organ pipe cacti are a dark green and stand, partially concealed in the brush at exactly human height. The air is alive with birds and insects and bats at night. The stargazing is like looking into the eyes of God.
You get there by driving down a little dirt road called "El Camino Del Diablo", or "The Devil's Road".
I drove out about three hours from Glendale, AZ to get there, arriving at sunset, and felt a profound sense of peace. I stargazed, listening to the bats hunt and sing, and slept peacefully for the first time in months.
I stayed out there for three days, sketching and painting the landscape, taking strolls through this almost alien landscape, and enjoying the light and sound and total absence of human intrusion besides myself.
On the fourth night, it was a new moon, and I awoke in the middle of the night. Something was amiss, and it took me a while to realize it was because I could NOT hear the bats. I was sleeping inside the van with the rear windows rolled halfway down rather than trying to set up the tent, so I when I sat up, I looked out of the van's reflective windows to discover what at first appeared to be A Horse.
It was something between pale gray and bright white in the starlight, standing maybe a dozen feet from the van, sniffing curiously. It made sense- I was in the middle of mustang country and there was quite a bit of foliage in the area for it and it did look like a truly wild horse- lumpy where the bones were jutting out, dusty about the hooves and face.
I was instantly seized by the sort of paralytic fear Sleep paralysis is made of. I couldn't move. It wasn't quite looking at me because it couldn't quite see through the windshield into the shadowy into the shadowy interior, but I had the distinct impression that if I looked away, it would know, and get me.
I already had problems with horses. My beloved Aunt Helen's Prize mare tried to kill me on two separate occasions, and the year before I had to carry my sister-in-law backwards out of a slot canyon whilst reciting the Saint Crispin's Day Speech as loudly as possible to keep a mustang from trampling us to death.
This is approximately what it should have looked like:
Instead, it was... off. like trying to draw a horse from memory.
The waist tapered in.
The legs were slightly too long or the torso slightly too short, probably both.
The ears were Triangular.
The head wasn't quite right- Too narrow and the jaw wasn't heavy enough.
The tail was too long and arced unnaturally away from the body.
The neck arched.
The nostrils were too high and close
The mouth too long.
Whatever this is, a Mustang it Ain't.
I watched it from the back seat as it sniffed around the front of the van, curious with about the side mirrors. It moved around the van, nibbling experimentally on the front door handle. It came up to the side windows, sniffing like a dog, and it's breath didn't fog up the glass.
Finally, it came up to the rear window, which was rolled halfway down to let the fall night air in. Not even half a pane of glass and two feet of air between us, and I could clearly see it's bright blue eyes.
Horses have Elongated pupils to give them a wide field of vision, and eyes that rotate sideways in their sockets so the pupil remains parallel to the ground. Rather creepy to watch, especially the ones with blue eyes.
A real horse that was curious about the interior of the van would have come up to the window more or less sideways, and looked at me with something like this:
Instead, the damn thing walked up and faced the back window head on, staring back at me with this:
I'm not sure how long we watched each other like that, eyes locked. My eyes burned. I couldn't blink. My mouth was dry. I couldn't swallow. My throat began to ache. I couldn't make a sound. My skin began to twitch, like I was severely dehydrated. I couldn't move. My lungs burned. I couldn't move. I couldn't move. I couldn't move. I couldn't move.
Something was touching the side of my hand on the seat next to me. It's my water bottle.
The realization must have broken the terrible paralysis in the lower parts of my brain first, because by the time I consciously realized I could move again, I was already flinging my water bottle out the window at it.
The top was open, and splashed out the window at the Mustain't.
I've never heard such a scream out of an animal. Something halfway between the sound of unquenchable rage vibrating in someone's chest and the way rabbits cry out to God when the dogs catch them.
It jumped back, pivoting away from the van, snarling at the water bottle. I don't think you're supposed to be able to see All of a horse's teeth at once, no matter how angry it is.
I watched it run into the night for some distance, it's pale body visible against the black sand and the dark gray shadow of the ancient volcanic cone it was headed for.
When the blood stopped pounding in my ears, I could hear the bats again.
I debated leaving right then, but I didn't want to get out of the van with that thing in the area, nor litter by leaving the water bottle out there. I also had the awful idea that if I left now, it might somehow be able to follow me home. I ended up staying up three hours to watch the sunrise, shaking and trying to figure out if I'd woken up from a vivid dream, if my meds had stopped working, or if that had really happened. I didn't dare move until I actually felt the temperature rise, before stepping out of the van to grab the bottle. I had my camera ready- I was still using a DSLR back then- to take pictures of the hoofprints, to show how close it had gotten to the van.
No hoofprints.
Beetle tracks in the soft sand around the van, and the clear foot-and-wing prints of a bird that had hopped around then taken off. But no hoofprints.
I went over the entire campsite with the tent broom, to make sure I removed every scrap of evidence I had ever been there, including my footprints, grabbed my water bottle, and drove the three hours back back to Glendale, then decided to do seven more hours of driving to Moab, Utah just to put more than 500 miles, the state line and at least nine things that could be considered "running water" between me and the Mustain't.
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I still have that water bottle. It has a dent in the bottom from hitting something, but that could have happened at any time. Strange thing though. I can't drink that bottle dry. I'll have it on me, drink whatever I've put in there- water, juice, iced coffee- and eventually feel like I've drunk the whole think and that it's empty. But I open it up and it's still at least a quarter full. I drink that. I get thirsty. I open it up again. ...and there's always a mouthful left.
Not sure what the side effects of drinking from a bottle cursed by a Mustain't to always have some left are, but it lives in the Emergency Breakdown Kit in my car now, just in case I meet another one.
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(I'm a disabled artist and make my living telling stories, please consider supporting me on Ko-Fi or Pre-order the Family Lore book on Patreon)