I was asked by Shoshinkan to bring my RAD workshop into the thread (so all you tough LEO types...be nice to this old lady ).

I recently took a self defense workshop that covered some of the scenarios above.

http://www.fightingarts.com/ubbthreads/showflat.php/Cat/0/Number/15833252/page/0/fpart/all/vc/1

My personal fear has always been being grabbed from behind, with a knife (number one in the above list ), and I can say that RAD covered this assualt in the basic workshop...but without the weapon. After going through it, I would suggest that any normal female check out the system.