Episode Four - S1-E4
Visible crew/equipment: After the court hearing scene, Cooper and company drive up to the veterinary clinic. Just before they arrive, we see a stationary shot of two petrol pumps. In the glass display on the pump on the left-hand side, a crew member is reflected. Cooper's vehicle then drives into view, and the same crew member is reflected again on the car door. (00:19:49)
Episode Four - S1-E4
Visible crew/equipment: When James is on the phone to Donna, Madeleine walks into the diner and stands at the counter. As the camera pans from James to show this, a white tape marker is visible on the floor near Madeleine in the right-hand corner of the shot. (00:31:16)
Episode Four - S1-E4
Visible crew/equipment: When James approaches Madeleine at the diner, she turns to face him and, in the close-up, some equipment is reflected in her glasses. (00:31:32)
Answer: The answer to pretty much any question beginning with "Has David Lynch ever explained _______?" is: no.