looks like a call. If hes thinking about his image at all (and it sounds like he is if hes adjusting periodically) then he could have stuff like AA/KK. He probably does this with Ahxh as well as maybe weaker flush draws and combo draws. I doubt he has a weak overpair or TP here but air is definately in there. Your earlier call with A high means he could be shoving medium overpairs and hoping for calls from 2 overcards, but id expect him to be alot tighter this time since its not a 3bet pot. If anything the insta-shove skews it more towards draws / air than a monster.