[Henry turns his right hand palm up, fingers straight, and mimics the strike he just taught George at half-speed, lightly tapping the side of her neck.]

I will do this. You need only displace my strike as it comes by pushing the back of your forearm against my wrist. Use the full strength of your body in this too.

[He demonstrates what he means with his left arm, turning his hips and using his core to give power and stability to the block.]

Prepare yourself.

[And he'll bring his right hand in a slow strike at her again.]