Let's tune in for another lesson with Rick.
Rick's Handy-dandy Anti-Vaughn Hair-Grab Technique.
Hello. Thanks for coming. I'll just get right to the point here. [Hits "Play" on the Omniscient Machine.]
This is what we call a front hair-grab. See, Vaughn is grabbing the hair and yanking Rosalie forward. You don't have a lot of time to react to an attack like this, but at least you have more time than you would if she was coming from behind, ha ha. [Crickets.] Anyway. So, front hair-grab attack. Vaughn yanks forward. Now, instead of moving forward, where she's directed, Rosalie is going to secure Vaughn's hand to her head--so she doesn't take Rosalie's hair with her as she leaves--then she's going to sink her weight down by spreading her feet a little more than shoulder width apart. This gives Rosalie a strong base. Now, Rosalie is going to haul Vaughn back toward her with her own grip on her wrist or hand, the same one that's preventing her from pulling her hair. Don't kid around with this, really haul back with your base sunk low, get them off balance. Now at the same time, she's going to put her fist out and catch her right under the arm. (Believe me, you have a lot of nerves right there.) When you punch, just make sure your thumb is on the outside of your fingers as they fold over your palm--you don't want to break your thumb. Good. You strike with your first two knuckles, real basic front punch. There are other strikes you can use, but beginners, front punch.
So, now, Vaughn is surprised since she's going the opposite direction she intended, and Rosalie just hit her under the arm, so she'll probably be out of breath or at least smarting. Now, with her base still solid, Rosalie is going to throw her free arm up between them, loose Vaughn's hand, and then strike the inside of Vaughn's arm with her forearm, knocking it out of the way. It's a little like windmill. Turn with the hips so you're not twisting up your back and you get more power. Now, continuing the windmill, bring up the newly free hand and hit Vaughn in the face. You can break her nose with the palm of your hand, which is probably ideal, but a nice front punch will probably do the job just as well.
Now scream so the whole building knows that you're being attacked by a psychotic bitch, and run away.
Better luck next time, Rosalie! :D
Note: You'll see several other hair grab techniques, like on youtube. The great majority of these may be helpful, but often involve a single move that damn well better work, or your head is at their knee. Not a good position for you if that move (wrist lock, punch, whatever) doesn't work. This is a nice technique because it establishes your base, so if you can get a strike in and they let you go, you're not going to fall on your face or their knee/foot.
Hair grabs from the rear are different, and involve turning under their arm so you can swing your arm into their groin. Those are uglier since someone grabbing you from behind is also uglier.