Visible crew/equipment: Caroline returns home after her first day at the ad agency. Just as she calls out, "Where is everybody?," the shadow of the boom mic moves across the wall, at the top left side of the screen, and simultaneously we can see the tip of the moving boom mic near the top of the foyer mirror. (00:23:35)
Visible crew/equipment: Jack finds the remains of the potted plant scattered on the carpet beside Megan. Then, just as he lifts Megan in her baby walker, the moving boom pole/mic casts a shadow on the wall, at the top of the screen. (00:31:45)
Revealing mistake: When Doris the TV repairwoman exclaims, "You crazy? You fed a baby chili?," it then cuts to a closeup of Megan, and this closeup is a flipped shot; everything is backwards. (00:35:25)
Answer: Black armbands are a traditional sign of mourning, though not widely used today. They are wearing them to mourn for Jack.
raywest ★