woo and indeed hoo
Banned
Throat. Good luck in your current fight to the death!
Nads, throat, knee cap, depending on what open shot you have. Good luck.
Edit: If you survive the tussle, study this video for future instruction.
http://www.youtube.com/watch?v=qHL2Cpb1618
Remember however that if you choose the throat there is a risk that you might kill them. Far less of a risk if you choose one of the other two options.
Solar plexus is an option too but has a smallish margin of error.
However, unless you are cornered and have no option but to fight for you life, running away would be the safer option.
I believe Bruce Lee once said that only an idiot willingly chooses to fight. Even with fighting experts there is always the chance that it can go badly.