Didn't know there were any left.



Anyway if you do get bitten in half by a Great White Shark which has attacked you from vertically below there is not much you can really do about it. You can only hope for a reasonably quick death. Hopefully this happens before having your head seperated from your torso by the those rows of giant serated knife like teeth whilst still conscious.

Unlike this poor fellow;

http://www.youtube.com/watch?v=E_W1JcRDCVg&feature=related

Sharks can also swim faster than people, so there's no point in swimming in a vein attempt to get away.

Hope this helps.