The night of Benghazi? He was smoking coke and playing Twister with Reggie..
I think you are on the right track.
I have always believed he was blown away on dope that night.
Probably blown away on pot, coke or crack to the point he was incapacitated and non-functional.
Remember - the only official word or comment ever made about his whereabouts or activities on the night of Benghazi is that "the president was informed".