If the plane is not tail heavy, in that the cg is correct,
he went into the chicken flop which is usually followed
by a flat spin. To get out the power must bereduced
to idle, alow the nose to drop (force with elevator/
rudder), add power to obtain flying speed and pull
up to level flight. If your plane is nose heavy it is much
easier to come out, the nose drops as soon as the
power is removed.

Johnny