Bryce sent me this great link to a very interesting study on women defending themselves from rape and the success rates of these methods. Huge hat tip to him as this is awesome. For those on dial up I will sum it up.
Women who used non violent methods of resistance (crying, pleading, etc) were raped about 96% of the time.
Women who used forceful verbal resistance (yelling, screaming) were raped about half the time.
Running works better then yelling as the women who ran were raped about 15% of the time.
Forceful physical resistance is slightly more successful than running. Those women were raped 14% of the time. Striking was more successful than pushing or wrestling.
Finally women who resisted using a knife or a gun were raped less than 1% of the time. I really think that figure speaks for itself. [editor notes the study did not talk about batons, mace, tazers, stun guns, etc. I would wager batons are about the same as guns/ knives and the other miscellaneous weapons would be between the forceful resistance and guns n knives categories.]