From the article I read online about Temporary Global Amnesia (TGA) there’s no real explanation for it. Sudden immersion in hot or cold water, vigorous exercise, or robust sexual activity could be triggers. Which leads me to the following hypothesis:
While riding vigorously down Mountain Home Canyon, I caught a flash of sunlight reflecting on something metallic out of the corner of my eye. Pausing to investigate, thinking perhaps one of my companions had overshot the turn and gone over the side, I discovered a poorly camouflaged, disabled alien space craft, probably a ship to surface shuttle by the size of it. My attention was observed by a creature lurking inside, who beckoned me come hither. At first he was strangely put together, a mishmash of recognizable forest animals, bear, deer, woodpecker, squirrel; but as I scrutinized him, trying to make out what I was looking at, he took the identifiable form of an attractive male human. 
Exuding old-world charm, and smelling of green copy paper, he extended a hand, offering a tour of his “camper” which now did look like an Aliner.
The touch of his hand made me flush with unaccustomed excitement and I made no protest as he led me through the trees into his “camper”. Without further introduction, he began removing my stinky, sweaty bike clothes and initiated a most languid, unhurried foreplay. I was helpless to resist. Robust sex ensued.
Clearly, I could not be allowed to return to my people in this newly enlightened and totally satiated condition; so my memory was wiped clean and I was sent down the hill with the taste of his Dos Equis kiss still on my lips.
Seems as plausible as a stroke with no symptoms to me.
judyrutrider 
You got with pleasure an erotic warm dream being awake. Many explanations are possible . Alone in the mountain under the sun is one of them
Love ❤
Michel
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I wondered if that was too explicit for this venue but, knowing that the French aren’t easily offended by sex, I hit the “publish” button. My apologies to the more sensitive American friends! This glimpse of my own mortality has worsened my already loose tongue.
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Haha! I’m not offended. I am wondering however if there might have been the possibility that you took a spill on the bike and ended up in an ice cold mountain stream coupled with the vigorous exercise of riding down the mountain to induce a wet dream creating a trifecta of events leading to the TGA?? Did your riding companions note that you were a little damp? Were you wearing the quick dry fabrics favored by the sports minded? If nothing else you are charmed and the TGA didn’t diminish your sense of humor….
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Had to giggle at your comment, reading all sorts (well, mostly one sort) of innuendo between the lines. Humor is a marvelous tool for deflecting tension in times of stress. I just read The Girl in Green by Derek B. Miller where humor is used judiciously to make the most unbearable almost tolerable. Spoiler alert: everyone on my Christmas list is getting a copy for Christmas.
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