What happened
Following a landing, a commercial certificate student pilot attempted to back taxi the aircraft toward the end of the runway for a subsequent takeoff. To execute the turn, the student advanced the throttle and applied the left brake.
As the aircraft turned perpendicular to the runway, the instructor assisted the student with depressing the brake due to the student experiencing difficulty. At this time, the throttle remained in the forward position. As the instructor released pressure from the brake, the tail of the aircraft began to lift off the ground.
In an attempt to correct the movement, the instructor pulled the throttle back to the idle position; however, the tail continued to rise. The instructor noted that it appeared wind had gotten under the tail, contributing to the continued ascent. The propeller subsequently struck the ground, causing the aircraft to become inverted. There were no injuries reported in the accident.