Uke moves in and catches 3rd Form to prevent Nage drawing the Bo-ken.
Nage counters this by irimi-ing in and drawing the sword upwards, going around Ukes movement. He then turns back into Uke using a Kotegaeshi movement to cut into Uke's head.

Nage = Sensei Brad Beeden.
Uke = Sensei Mark Eastman.
Clip Ref=Ko11