Key idea
Counter the outer reap with the attacked leg.
attacks right against right leg. Before losing balance backward, Tori stabilizes on the left leg and brings the upper body forward into Uke. Tori’s attacked right leg returns the outer reap against Uke’s attacking right leg, with the hands directing Uke backward. Mirror on the left. requires recovered balance; a leg swing after Tori is already falling is not a controlled counter.