Best mountain flying you’ve ever done  

Hey Fake News Jiss Swallower, did I say I did it during the day?  Nope!  It was pre NVG days, or NIGHTS to be more precise, and I routinely went to 13K, 14K or even 15K so as NOT to find any rock solid darkness.  Maybe you should get clarification instead of assuming things that just aren't accurate.  Oh, and I don'd recall the FARs ever referencing "AGL" altitudes when it comes to Supplemental Oxygen, only MSL.  You know, like 12,500 MSL to 14,000 MSL for more than 30 minutes, the minimum Flt Crew for 14,000 MSL and everybody on board for 15,000 MSL.

As they say, "it's better to remain silent and be thought a fool, than to speak and remove all doubts."