I, Darrin, Take This Witch, Samantha - S1-E1
Visible crew/equipment: At the dinner party and after a gust of wind, Samantha uses her powers to close the front door. As it shuts, the shadow of the moving camera is visible on the wall on the right-hand side. (00:22:23)
Samantha Meets the Folks - S1-E14
Visible crew/equipment: When Aunt Clara's satchel and umbrella are "floating" up the stairs the shadow of the boom pole making the magic is visible above the Menorah at the top of the wall.
A Vision of Sugar Plums - S1-E15
Visible crew/equipment: At the start, when Sam takes the tree out of her purse and places in on the carpet, her white tape mark is visible on the carpet beside her foot. (00:00:45)
Driving is the Only Way to Fly - S1-E26
Visible crew/equipment: As Harold and Samantha drive away from the traffic jam, part of the camera rig is reflected in the side window of the car. (00:16:00)
There's No Witch Like an Old Witch - S1-E27
Visible crew/equipment: As Samantha helps Aunt Clara out of the closet, as Samantha says, "Don't go 'way!" the boom mike's shadow becomes momentarily visible at the top of the screen. (00:02:00)
Visible crew/equipment: When Abner comes over to the Stephens' near the end to say Gladys' problem has got worse, just as the door is closing a crew member's hand can be seen near the Bob ensuring it closes. This is just before the shot goes to Darrin.
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