Bleeding speed fast
Gentlemen,
there is one possibility for a very fast deceleration from cruising speed to stall speed (low speed, high AOA stall), and that possibility was only brushed by a few people here : pulling back hard on the elevator controls.
I leave to your imagination why such an action would be taken. I have my own idea. And remember, the humans in the cockpit are not the only ones with access to flight controls. The aircraft itself usually has the final say over these controls.
Regards