Hey, I searched for 'Ozumat' and 'Death Strike', don't think this is a repost.
It's not much of an exploit, more of a tip really because Blizzard will not ban you for it.. it's not really how the fight was intended but it's clever use of game mechanics.
So basically, if your group is having trouble with the Ozumat encounter in Throne of the Tides, a death knight of any spec is capable of soloing phase 2 of it with the use of Death Strike in order to heal yourself. (25% of the damage you deal, and you're hitting for 200k - 400k, our healer dc'd and everyone died just before phase 2 so I ended up finding it out that way as frost spec).
This can obviously be done in any case where you're hitting for more than usual, blood dks tanking this encounter have most probably experienced it themselves but if you're frost/unholy and your group has trouble with this it's a nice addition.
Side note:
The HP regen of blood is so OP at the moment, it's also possible to solo most bosses of TBC raids (3 bosses in SSC are a bit of trouble, + reliquary of souls in BT.. I'd like to see someone solo that, solo'd every other boss pre-sunwell). It's also possible to solo naxx (though I'm yet to solo patchwerk), and I've also been capable of soloing ICC trash.
Again, not much of an exploit but I felt the need to contribute a little something. Been a leacher here for a while, use to have an account but I couldn't remember the name. (Not here for rep so sorry if this tip is common knowledge to some people :P)