Samantha is Earthbound - S8-E16
Revealing mistake: When Samantha, Darrin and Dr. Bombay are in the living room and walk as a group towards the television, you can see the crease in the carpet where the floor is going to collapse.
Samantha is Earthbound - S8-E16
Revealing mistake: When Samantha is in the tree at the party, you can see the reflection of the branch against the "sky" revealing blue painted sky.
Samantha is Earthbound - S8-E16
Other mistake: This episode is a repeat of Season 4 No Zip in My Zap with the better Darrin 1. Since Samantha previously became earthbound for not practicing her normal, day to day, witchcraft. They would know why Sam is again earthbound. And, Samantha constantly uses her witchcraft.
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