This article on newsBTC.com (which I find lives up to its name as a good source of bitcoin news, like a succinct version of coindesk) sheds some light on Mark K's frame of mind:
http://newsbtc.com/2014/02/25/alleged-chat-transcript-mt-gox-ceo-discusses-exchanges-current-issues/It is based on this online discussion between Mark and some other guy:
http://www.wickedfire.com/shooting-shit/179038-my-conversation-mark-karpeles-mtgox-2.html#post2164682Take home message: I get the sense that Mark is in some sort of state of depression which renders him cognitively incapable of running his business. I would not rule out the possibility that the 700K bitcoin are "inaccessible" because he just can't remember where he stashed his paper backups.
Panicky may be the best answer to the poll. But he may be so beaten down that he doesn't even have the energy to panic. If I were starting the poll now, I might add an option:
stuporous or
catatonic