As someone who's disliked and mistrusted Senator Clinton for a long time, has never forgiven her for not supporting the Levin amendment, and truly loathed her once she started attacking Obama - especially that appallingly hypocritical `I am honoured` performance, I'm trying to be objective here.
(a) she's at least slightly high from sleep deprivation;
(b) she's desperate - not only because she personally wanted the nomination so much, and it must have been dreadful coming to terms with the fact that the interloper might actually win, this adjustment was coming at the same time as she was having to keep performing - but also because she (I'm persuaded of this from reading so many analysts who know her friends) genuinely believes he's an incredibly high risk candidate.
She can't wrap her mind around the idea that he could win the general if he can't win the working class whites and I think she doesn't believe it's only that they prefer her but would vote for him in the general - I think she genuinely doesn't think enough of them will vote for him.
Bear in mind that all this is going on for her while she's at the same time working her butt off in the sleep deprived state where her judgment's of necessity impaired; AND she's surrounded by staff and party machine type people who share her view and thus reinforce it. That's then doubly reinforced by a staggering disparity in the vote for the two of them in WV. How can she know all through her, remember she's sleep deprived, that it's time to fold when she doesn't know how the rest of the superdelegates are going to vote?
It's probably inconceivable to her that they're all going to ignore her virtual monopoly of the white working class and rural vote in Philadelphia and Ohio, this one in W Virginia, then Kentucky likely to duplicate WV. Then she looks at the staggering majority McCain has over Obama in Florida when the same polls show her winning it.
Not only that but probably all she can see is a general election being run under the onslaught of Wright, Farakhan, Ayers, elitist ads.... (And probably blithely dismisses any attack against her as stuff she'll easily dismiss - been there, done that.)
If you want someone to blame for the race going on, blame the superdelegates. From her perspective, the SD's job is to intervene if the primary's thrown up an unelectable candidate. Her mission is to get them to see it all her way. Why wouldn't it be?
All people respond to the signals they're getting: why on earth would anyone expect her to be any different, especially when she's so sleep deprived. Don't forget, from her perspective, most of Obama's wins - and thus his advantage in delegates - accrued to him before Wright, Ayers etc and before he started to lose the white working class vote.
I can see very clearly why she believes she has right and the good of the party (and country) on her side. I imagine it's incomprehensible to her that everyone else won't come to see it too.
(Maybe Edwards' endorsement will have given her a jolt - get her really questioning the viability of the process.)

Nice M Dick ref, Ripper (good to see your graduate school efforts paying off). The extended metaphor works well.

High on sleep deprivation indeed. And running on fumes.

Poor dear, I wonder what the collapse will be like?