ok from what i read, the mig 29's cobra that we see is actually
called the hook or tailslide. Basicly it changes its AOA from a
close to level flight, although some people claim that it is more
of a 30 degrees climb, until the airspeed drops to 0, then they
drop the nose back to horizontal altituse, and accelerates
off.
Here is a little discription from a person who was taking a ride in
a mig 29.
"We then rolled over and did a "Split S" to a lower altitude into a
"7.5 G loop",
followed by an "Emmelman", a "climbing turn", then the famous
"Cobra"
maneuver where the MIG flies at the same altitude but in a vertical
position.
He then recovered and flew the plane straight up, pulled back, both
engines
reached "0" air speed where upon we slid back on our tail in a
vertical position.
We then "brought-in" both engines, first the left, then the
right.
That was the "tail slide". "