That is the only time I use the rear brake. Never in a panic stop, just don't trust the rear brake not to fling me off due to my skill level (I have seen it happen, so no). I have pulled the front brake so hard the back end came off the ground, so not much use with the rear brake then. I use the rear brake when lane splitting, coming to a stop at a traffic light, low speed maneuvers, sand (impromptu offroading), and POPO sightings of course. YMMV