Terrified tourists were sent scrambling after a sightseeing helicopter spun out of control and crash-landed directly on top of two people at a scenic lake in China. Dramatic video shows the yellow gyroplane flying in formation before smoke pours from the aircraft and it suddenly loses altitude. As the pilot struggles to regain control, the helicopter begins spinning before slamming into the ground. Two tourists were struck by the aircraft as they tried to flee, suffering serious head injuries. Early indications suggest turbulence from another gyroplane may have caused the pilot to lose control.