I dont know how to explain it. If you are caged just push back and pull up. If you aren't caged then push back pretty hard and put your mass on your bars.
If you aren't afraid of a little road rash practice your skids on a basketball court after a good rain. Dont go balls out or anything, but once you get moving at a decent clip you should be able to skid easy. Just remember to start to mashing again before you whip too far and eat it. Dont worry if you do because it happens to the best of us.
For the record, you are wicked brave with that ghetto rig. More props to you.