they tried to sacrifice the Brady bunch while filming an episode. The dad save their life.

Filming an episode where they were on a roller coaster there was a camera mounted to the front cart.
Before filming the dad actor asked if it was tested.
They said no. He insisted on a test run and they said no.
After a long arguments No refusal to film they finally tested it.
The camera mount fell of smashing Into the area the kinds were sitting.
All would have been seriously injured or dead.