I have over 13 years martial arts experience, and I raised this question with myself. However, while evaluating myself, I also began to realize that while I'm not as strong as I used to be, I began to remember my pressure points, vital organs and I also remember that one of my advanced hand to hand classes, showed us how to use a persons weight and momentum against themselves. I am a combat veteran and I have always advocated to run if that's an option, however, in a surprise attack, you have a couple of things working for you, one is adrenaline and the other is your basic need for survival. In a situation such as an ambush, your instincts and training will take over. Martial arts are great, as are other forms of self protection, but in the end, nothing can stop a attacker that has the upper hand. Personally, I carry multiple weapons, ie, knives and I also open carry. I was in a situation after I transitioned, where a 6'3 guy got out of his car and began to threaten me because he thought I had my bright lights on. (My truck has a 3" inch lift) so my lights we're shining right in his rear window while at a drive thru at McDonalds. I grabbed my magazine out of my console, walked to the back of my truck, and removed my sidearm and bolstered it, then walked to the front of my truck. When the would be person saw it, he made the choice to shut up and get back in his car and wait for his food. Law enforcement was called, unbeknownst to me, and arrived after the person left the scene. I talked to the officer, and he told me that what I did was very smart. He knew the person due to prior altercations, he was going to go talk to him about the situation. My point is this, know your surroundings, go out in pairs if possible, and most of all, you can only do what you can do. When I go out alone I always have my phone in my hand and accessible. I hope you stay safe, continue your martial arts training, be smart, and be aware of your surroundings.