Revealing mistake: When Sam and Endora are sitting on the wing of the airplane, you can see folds in the blue backdrop for the sky.
Revealing mistake: The wires helping the Good Fairy fly are visible as she flies around the living room. They also are visible when Samantha flies outside a couple of minutes later. (00:11:50)
Samantha and the Troll - S7-E19
Revealing mistake: The wires used to help Adam's cup of milk float around are plainly visible. (00:00:25)
Answer: Larry had been telling Darrin what it means psychologically that Samantha gave the coat away. Larry said giving it away meant she's happy being married but if she liked the coat it means she desires to be single and carefree. So when Darrin sees the coat, he immediately thinks Samantha doesn't want to be married and the fact that she twitched it means (in his mind) she wants to be a single, carefree witch again.
Bishop73