.
For everyone's reference ... if you have a very similar experience, try to refrain from attempting to start the system more than twice. Those power cycles could well corrupt data that might otherwise be easier to recover.
If you have problem like this and you want to save your torrents and everystuff ... you can remove the hard drive and connect it to another system as a slave/data drive and get your data backed up before attempting further boots or more aggressive repair options.
What is described here sounds a lot like a short or other serious power issue ... if you get a bit frustrated and try to keep booting it, your chances of Bad Things Happening to the data are high and increase with each attempted boot.
FYI - FWIW
Zippy ... all the best of luck! I been through this three times now, and it sucks more and more each time.

-- t3h 3Xp4t