First, mountain lions typically break the neck of their victim right off, which is a mostly bloodless and quick event. They will then drag the victim to a high hidden place to eat them (usually up in the rocks). (If you have to die by predator, ask for a lion and not a bear.)
Second, if you’ve ever been in SAR, you’ll know that clothes strewn along a trail or neatly piled are indicative of a hyperthermia (heat) victim in the final stages, as one’s skin begins to burn from nerve damage, and wearing clothes becomes painful. There are incidents of clothes in neat stacks or along the trail that have led to finding people, though usually by then it’s too late.
But…it’s also indicative of hypothermia (freezing) and is called paradoxical undressing. Here’s a link explaining it:
https://www.livescience.com/41730-hypothermia-terminal-burrowing-paradoxical-undressing.html
an excerpt:
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Terminal burrowing
It's well-known that warm-blooded hibernating animals will often dig or burrow into a small, enclosed den to spend the winter. The tight quarters surrounding their bodies can help to minimize heat loss.
Humans, in the final throes of severe hypothermia, exhibit a somewhat similar behavior known to researchers as "terminal burrowing." In a 1995 article in the International Journal of Legal Medicine, researchers from Germany described hypothermia victims "in a position which indicated a final mechanism of protection, i.e., under a bed, behind a wardrobe, in a shelf, etc."
Terminal burrowing behavior isn't widely studied or well-understood, but the German researchers described it as "obviously an autonomous process of the brain stem, which is triggered in the final state of hypothermia and produces a primitive and burrowing-like behavior of protection, as seen in hibernating animals."
Paradoxical undressing
As strange as the terminal-burrowing behavior might seem, an act called "paradoxical undressing" is even more confounding. The term describes the behavior among many victims of extreme hypothermia of peeling off most or all of their clothing, increasing heat loss.
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Here's another article with an excerpt:
“The reason for this paradoxical behavior most likely is caused by hypothermia paralysis of nerves in the vessel walls, which leads to their extension, thus giving a feeling of warmth.
According to another theory, vascular spasm, which occurs at the first stage of frostbite, leading to disruption of the vasomotor center, which in turn gives completely inappropriate for this situation, a feeling of warmth”.
https://earth-chronicles.com/anomalies/the-phenomenon-of-paradoxical-undressing.html
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It may be hard to find someone who's basically buried themselves.
There’s no high strangeness to finding clothes on/by a trail out in the backcountry, unless you also see naked people running around (which I have, but that’s another story - I once ran into a couple in Moab who train naked for the Senior Games—some of you may know who I’m referring to).