[TalonDJ]

steep climb stall

That is what a cargo shift causes.

When you get that much mass rotating that quickly, Mr. Newton takes over and makes it continue to rotate even as the pilot commands it to stop

Not unless you are below controllable airspeed. First of all during climb out you aren't 'rotating' at all. That happened just as the plane lifted off. By the time you are at a thousand feed there has not been any rotation for a while.... unless you command one, lose engine power, of your CG moves aft suddenly (cargo shift). Planes are controllable. Momentum is pretty easy to overcome as long as air is moving over your control surfaces. Once that stops momentum is only one of your many worries :P

[I cannot think of a name]

“That is what a cargo shift causes.”

If the weight shift is not greater than aerodynamic force - stick forward to maintain airspeed, flight normal.

If the weight shift is greater than can be aerodynamically controlled (stick forward won’t prevent continued nose rotation)- nose won’t drop when stall is reached.

Airplane reaches stall due to angle of attack, nose drops at stall and after sufficient altitude aircraft becomes controllable - normal ops. Exactly what the video shows, just without sufficient altitude to recover.