Shake Hands with Danger
The original video is up to watch. Safety Video from 1980 with 1970 themes. One highlight is watching a man falls from a high height and dies... while a random guy starts singing and the camera films him. Riffers wanted.
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Bob Jones commented
Don't you mean this?
Edit: looks like there is a few, the Rifftrax version is from 1980 though it looks like, there is also one from 70 and 75!