Burg400, you are thinking of "The Twilight Zone" movie. Actor Vic Morrow and two Vietnamese-American children were killed when the pyrotechnics malfunctioned, causing the helicopter above to fall to the ground, crushing the three.
There actually is video of this scene, but the deaths are not visible. Most of Vic Morrow's scenes were already filmed, and his shots were left in. As for the rest of the movie, it made it to theatrical release, but did not do very well (for the most part, it was an awful movie!!).
My favorite crash scene is from "Cliffhanger", a movie which made "Die Hard 2" look like Shakespeare. I found myself hoping all the characters would die just so they'd SHUT UP
!! I mean, were all of Lithgow's henchman stupid enough to believe that he'd share ANY of the money with them? I guess all the budget went into that amazing mountain crash.
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