This technique involves thrusting the muzzle of your firearm into the offender and then pulling the firearm toward you while twisting the firearm so that your dominant hand is rotating counter-clockwise (clockwise for left handed shooters). This technique can be effective against even a much stronger offender because, since you are holding the frame and the offender is holding the slide, you have a superior grip on the firearm. Twisting the firearm makes it more difficult for the offender to hold and the front sight might cut his hand in the process. (This technique could also cut your training partner's hand, so be careful).
Use of personal body weapons (think outside the belt!)
If you are a realist, you know that drawing your firearm or other tools from your belt against a spontaneous type of attack within five feet is not as easy as it sounds. A safer alternative might be to start out with personal body strikes. Striking the offender's face with the heel of your palm or with your elbow can create an opportunity for you to transition to a more appropriate tool for the job.
Close quarter shooting
There are entire books and training videos devoted to this topic. Buy one! Being able to access your firearm and use it effectively from zero to five feet is vital to your survival. While waiting for the training books and videos that you're going to order to arrive, work on developing these skills:
Practice drawing from your holster until you become better than proficient! Under stress, your ability to perform fine-motor skills, such as manipulating your holster will diminish. Only by performing literally hundreds of draws will you truly be proficient. I know that sounds like a lot but how about 25 draws per day? Ok, how about ten per day? The five or ten minutes per day devoted to drawing your firearm might be the best time you ever spend.
When using a firearm at distances from zero to five feet, you don't need to lock out your arms and achieve a sight picture. In fact, doing so would give the offender an opportunity to grab your firearm and re-direct the muzzle or even disarm you.
Instead, practice drawing to a shooting position with your firearm held close to your body. Placing the bottom portion of your fist against your body will serve as a reference point and ensure that your firearm is properly canted. Canting the firearm outward will prevent the slide from becoming entangled in your clothing, possibly inducing a malfunction. Positioning the firearm as indicated and locking your wrist will ensure consistently accurate rounds. Be sure to keep your non-dominant hand out of the line of fire!
Train hard and stay safe!