Read this last night. Would love to get more details, but this seems to fall into the "sh_t happens" for me. I've fallen many times with a long tumble down Owl's Head slide being the worst.
I even recall standing on what could be that exact spot in a whiteout and a feeling of vertigo taking over. Looking down a chute, it really looked like I was looking on a flat trail. Took a moment or two to understand which way was up. I understand the hiking alone thing, but not sure how it would've helped him there.