IDK ... I never could get my feet out of clipless pedals quickly enough, because (I think) shoes that gave me enough room in the toe box were loose in the heels. In any case, pinned flat pedals and Five Ten Freeriders (I think) allow me to do some pulling (by 'scraping my foot' around BDC) or at least taking the weight off the pedal on the opposite foot's downstroke.