There is only one possible method of recovery from a deep stall, which involves banking the aircraft 90° and pointing the nose down. Given enough altitude, sufficient airflow will develop over the elevators to enable the aircraft to be recovered. Potential pitfalls are overspeed, entering a flat spin, disruption of airflow into the jet engine intakes and entering another high speed stall while attempting a recovery pullout. This really is a last throw of the dice!