A Freak Accident in the Twilight Zone

The 1983 movie release of the Twilight Zone had a great tragedy involving two child actors and Actor Vic Morrow. During the shoot while simulating a Vietnam war battle, a helicopter crashed into the three, decapitating Vic Morrow and chopping up the two children.

Source

The making of the movie had consequences which overshadowed the film itself. During the filming of a segment directed by John Landis on July 23, 1982, actor Vic Morrow and child actors Myca Dinh Le (age 7) and Renee Shin-Yi Chen (age 6) died in an accident involving a helicopter being used on the set. Pyrotechnic explosions caused the low-flying helicopter to spin out of control and crash.

"The probable cause of the accident was the detonation of debris-laden high temperature special effects explosions too near a low flying helicopter leading to foreign object damage to one rotor blade and delamination due to heat to the other rotor blade, the separation of the helicopter's tail rotor assembly, and the uncontrolled descent of the helicopter. The proximity of the helicopter to the special effects explosions was due to the failure to establish direct communications and coordination between the pilot, who was in command of the helicopter operation, and the film director, who was in charge of the filming operation."

Below is the a video of the accident i found on youtube: