The best thing an untrained person can do vs a trained person??? RUN AWAY. walk away. Get away. I just turned 34 and I've been in 2 street fights my entire life. I could have been in dozens. And the only 2 times I did get in a fight were 1. Alcohol was involved. 2. A friend who is a hot head started the fight, while under the influence of alcohol. It's very easy to avoid a fight. Yes the antagonist will call you names, like pussy, bitch, punk what ever. I almost killed a guy in a street fight in high school when I wasn't an adult. (I don't count fights before I was 18. I was in about 4 of those) and I resort to my wrestling base. Grabbing a dude and slamming them on their head. You do that to someone on cement you can and will seriously hurt someone. Just YouTube street fights bodyslam KOs if you want to cringe.