Well - LFB can be used to do MANY things. Depands on the car and surface over which you're traveling. I really love the feeling of ocontrol in very fast bends when car starts to understeer a little and you just slightly touch the brakes to kill it not moving your legs and destabilizing your car with abrupt lift-off and stomping on the brakes. But generally in 90% situations my instructors always told me to LFB only off-throttle in AWD car.