I've seen a lot of F-16s and others doing wierd manuvers over EAFB.. with the engine contrail marking the flight path..
The plane will be kinda wings level, slightly nose up, and descending vertically... about like a dethermalized free flight.
The utility of such a manuver escapes me.. as it puts the plane in a zero-airspeed no-manuverability condition, which in a 1V2 would be fatal!
I have an SETP report on testing the SAAB Draken at EAFB in '96.. 3 interesting "super stall" modes.
Abrupt full aft stick at 140 knots...pitch oscillations between +100 and -20 degrees... oscillations!!.. +1.5 to -.5 g
Inverted super stall... stick full aft at 140 knots, then full forward after the initial +100 degree pitch up.. results in a -2 g pitch down, stabilizing
at -60 alpha, nose slightly above the horizon.
Tactical entry superstall.. rolled inverted to a Split-S.. at -90 degrees pitch, full aft stick.. the plane pitches up with oscillations between +40 and -20 in pitch.
Full longitudinal stick -in phase- with the pitch oscillations (pitch rocking) recovers the plane to near vertical nose down pitch.