Ah,you sound like you know how to protect yourself,I wish i could be as sure.I'm an over 60 year old women and not as solid on my feet as I used to be.This is why these pit attacks on dogs scare me,as I always have 2 or more dogs walking with me.I just practiced what you wrote about the chin and elbow and then using the free hand to use the knife.And I think i could do that.I know I would be angry enough to use a knife just wonder if I'm strong enough.Thank you,I've been trying to find some real answers to protect myself and my pets.