Maybe the connection is the idea of a non-resistive uke? But here he's not only non resistive, he's also non flowing, he just ceases to move after the initial strike, like he ran out of batteries.
At any rate, I wouldn't call this form of training "combat". The first particle "com" or "con" implies an interaction, and this is a one sided practice.
Or maybe the connection is that uke is held motionless though some kind of ki manipulation.