pointfiveoh, . . . Pharley gave you the right advice for unarmed combat.
You absolutely MUST gain the upperhand and it must be done immediately. If you wait, . . . looking for an opening, . . . it just may be an opening in the ground about 6 feet long and 6 feet deep.
Fighting should be always only as a last resort: but when you have to go there, . . . go there with the mindset that it is you who will survive, . . . it is you who has the will, . . . it is you who will stand when it is all over.
Don't overlook any thing you can lay your hands on as a weapon, especially anything with mass and hardness. A medium to large size glass ashtray placed un lovingly upside the bg's head will cause him to "pause and consider". Kick, gouge, scratch, bite, whatever it takes.
One of the best weapons I have ever seen for unarmed combat is simply a look. You get the "look" of a psycho on your face, with some drool coming out the side of your mouth, and a real crazy upbeat attitude beaming from you and most guys will just sashay on down the road, . . . ain't messing with that "crazy".
Anyway, . . . stay safe, . . . and the best way to do that is to stay away from places that ain't safe. Be aware of your surroundings, . . . know where your getaway exit is at all times. And don't be afraid to run away from trouble. I walked away one time from a guy who just wanted to fight. I would have to have hurt him bad to stop the altercation, . . . so I just walked. He followed me for several hundred feet, . . . cursing, swearing, and spitting at me. When the "law" came down, . . . it came down on my side and I never had to deal with him again.
May God bless,
Dwight