You’re clearly describing a martial artist’s positioning:
- Move the body off the line of attack;
- Create 45 degree angles, making the opponent have to take two steps, which places the defender at a one step advantage.
The martial artist may often meet a handshake the same way they’ve been trained to meet an attack: with a similar or equal force. And I actually think that’s a very polite and considerate rule. Because on the one hand I choose to not overwhelm, and on the other hand I refuse to be overwhelmed. Neutral buoyancy. Adjusting to the moment. Moving to a more balanced position. But… not out to dominate or intimidate. That’s being either a show off or a bully.
Which, of course, any black belt in Aikido would quite naturally understand.