The pilot's improper landing flare, which resulted in a fractured engine mount sway bar and subsequent difficulty controlling the airplane, and his inadvertent application of throttle pedal during landing, which resulted in a loss of control.

The student pilot’s exceedance of the weight-shift-control aircraft’s critical angle of attack and the flight instructor’s delayed remedial action and failure to maintain the proper airspeed after encountering localized turbulence during approach, which resulted in an aerodynamic stall.