Uke moves in and catches 3rd Form to prevent Nage drawing the Bo-ken.
Nage turns outside using a negative movement to lead Uke around. Nage uses a Kotegaeshi movement together with a cutting motion of the Boken to apply the technique.

Nage = Sensei Mark Eastman.
Uke = Sensei Brad Beeden.
Clip Ref=Ko12