Bird droppings

I think it was the dehydration more than anything that really zapped you. If it were the cold you would have felt your energy level dropping when we were hiking out to there. I assume you were standing in the sun holding the end of the rope the entire time I was stuck on the wall due to that group's wonky anchor. That you recovered quickly is another good indication it was heat/dehydration. That stuff can really sneak up on you and then hit you hard.