Brady Bunch, The - Over a Barrel
This slip up occurs in the episode "The Cincinnati Kids." Watch when Alice is looking for Mike's lost sketches and is at the barrel ride. She is standing next to the empty barrel, looking into it, when the ride starts moving. Watch how fast the platform then moves. There is no way the ride operator would have been allowed to start the ride seeing Alice unrestrained, even worse standing next to the ride. She would have been thrown off and injured!