Low altitude maneuvering, including stall, spin, or controlled flight into terrain (CFIT).

Bottom line

Many loss of control in-flight accidents are the result of stalls, spins, or accelerated maneuvers. Controlled flight into terrain often results from continued VFR flight into areas with a low ceiling or low visibility, flight at night, or incorrect interpretation of a chart. In a low-level gliding steep turn during an engine failure emergency, excessive rudder deflection in the direction of the bank while increasing elevator back pressure can rapidly turn into an unrecoverable spin.