Stall, separation of smooth airflow over the wing, loss of lift, meaning no lift generated because of disrupted airflow. The Hunter and the T-Bird did not stall. They were flying. An aircraft that is stalled is not flying.
Nice short explanation here: http://www.allstar.fiu.edu/aero/flight55.htm
And a very short vid (by a friend of mine): https://www.youtube.com/watch?v=5wIq75_BzOQ
Cheers.
Terminology. In the head-on photo just before impact, you can see the condensation from separation of smooth airflow over the wing. That separation causes a loss of lift so the aircraft mushes.