If you read the book GROWING UP BRADY by Barry Williams (it might have been in the TV Movie too, but i didnt see it) ...the last shot with the Bradys on the big coaster almost caused injuries...Robert Reed (Mr. Brady) insisted on a test run for the mounted camera on the front car. After a few minutes arguing with the producers, who swore that the camera would be fine, they did a test run, and the cars came back with no camera. So we almost lost some Bradys. Still, after some adjustments, everything was a-okay. Not that the cast wasnt feeling REAL edgy about it.