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.
Deliberate mistake: The drunk that is always in the bar in New York is the same drunk in Salem that sees Sam twitch the witch on the signs from an old hag to a young witch resembling her.
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)
Continuity mistake: At the statue, with the ocean in the background, the white fishing boat appears and disappears between shots.
Other mistake: When Larry is in the living room asking where Darrin is, before Darrin is zapped back, the kitchen door is opened and closing. Nobody is in the home or in the kitchen. The door shouldn't be opening. Likely, a crew member was exiting the living room and the editors did not catch the door swinging.
Samantha's Hot Bed Warmer (2) - S7-E4
Continuity mistake: In the opening scene, Samantha's purse is on the couch. It is initially lying flat with handles up on the back of the couch. When the officers are let into the room, the purse position changes. It is now standing upright.
Salem, Here We Come (2) - S7-E2
Continuity mistake: The demerit rod disappears when Hepzibah is in the living room. The camera goes to a wide shot and then returns when Darrin gets his final demerits.
The House that Uncle Arthur Built - S7-E18
Continuity mistake: In the opening scene, the pillow on the right side of the couch changes position.
The Good Fairy Strikes Again - S7-E16
Continuity mistake: The tomato juice stains on the Good Fairy's dress alternate between very dark and faded from shot to shot. (00:23:10)
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