Yes, I think Pattie experienced that same physiological shock that I did when I got lost.
Going from "having fun" to.... its now dusk, I gave my map away, the signs are not "working" for some reason and.... I am alone with no cell reception was very similar to a "flight or fight" response:
- I suddenly experienced an adrenline rush. I started walking faster. I was eager to see over the next hill or around the next bend. I "knew" that the correct trail must be just... over there- right?
- My thinking became hyper focused on the trail. Yet, I did not immediately connect that I was speed walking in circles
- Analytical thinking shut down: I did not consider the following: Can be more than one way off this mesa? The trail head was at low elevation- right? What if somebody twisted that sign- I have passed it twice now?
- I got tunnel vision. I only saw directly in front of me. Everything else was a blur. Mesas can have "draws" where water drains off. These can be official or unofficial ways down. Yet, I never looked for one.
In the end, I was lucky. My tunnel vision cleared up. I was able to start thinking again. The terrain was pretty open, and.... then I saw a rural road in the distance.
OK. Understand. Panic plus sundowning effect? We all orient much worse in the darkness, our eyes are not made for it. Plus, realistically, vitamin A is the only one not recommended to supplement exogenously. So our rods are scanty and some of us might have a degree of nocturnal blindness due to retinol deficiency. And the picture suddenly gets from 3D to “flat”.
Night panic is another common thing. Nights for our ancestors were scary. Animals, sudden attacks. The fire helped. So…having no source of external light can subject one to primal fear. I know people who attach an extra lamp to the windshield when driving, of purple color, to facilitate adaptation from light to darkness. I don’t know why purple.
Do we know when Patricia started her hiking that day, and when was the sunset?
Also, that owner of the house she stayed in, who sees people out, where does he say good-bye to them? It is something that other tourists may testify to.
I am very sorry for the fear you felt, but it is the normal response and the normal, expected shift in perception.
I wonder if Patty was a morning person and started her hike in dusk that morning?
ETA: I can offer the explanation why your thinking was hyperfocused on that trail. We humans have rather narrow field of vision as opposed to dogs or hares, so looking straight is typical for us, but this is where there are very few rods, they are on the retinal periphery but at daytime we don’t use it. So you were trying to “wake up” the rods in the center. Makes total sense, but one does feel panic at such moments.