After the scene with the kids at the coffin ends, the camera now goes to the Old house with Barnabas standing in the room. As camera pulls back to a wide shot you see Dr Hoffman standing to the left waiting on the cue to enter the scene.
The shadow of another camera zooms across the wall as David comes down the stairs to talk to Vicki.
The shadow bounces across the wall panels as David nears the telephone in the hallway.