I think I can likely do any of the things you or Dan can do.
I know what I call internal. I just don't know what you guys are calling internal. Actually I'm not sure if you guys know what you are calling internal.
I will Gladly go see Dan if he's ever with in 300 miles of me. I think it would be fun, and trust me I'll report what happens.
Chris, does this stuff ring a bell for you?
About the cross or the back chest area:
Imagine shoving a drive shraft or any pole into a hole in the floor then
slide a peg through it horizontally. Next grab the peg as it sticks out left to right with both your hands.
Now imagine the hole you stuck the pole into is attached to an engine with 1000 ft. lb. of torque and I turn it on.
When you get out of hospital with your broken arms healed you can understand how powerful it can be if:
1. the pole is your spine
2. the peg is tension held across the back and chest
3. and the engine is the ground through your legs through your hips that turn the spine or pole at the waist.
Everything attached to it is launched without you dedicating much to the effort in a forward direction. It makes powerful kicks, punches, throws, and shoves without you giving much to lose or have someone take your balance.
You are wholely dedicated without being dedicated.
The frame is strengthened through connections throughout the body which can be strengthened further still through breathing and pressures there. You are using the ground for power. Of course, it is the way you are connected that allows this power move through the whole body from foot to hand.
The above example can be quite effective in ground grappling for reversals when you are on your back with someone on you giving you weight. You hold tension in the cross and turn using the ground from your feet through the hips, turning the spine like a drive shaft .....which......... turns the peg (your scapula area). Whats attached to the peg? Your shoulders and arms.
I have seen guys lifted off the floor and thrown. The key is to not try to throw them but to maintain connection and just turn into yourself.
Breathing and certain other things add to this.