Visible crew/equipment: On the train at the start, after everyone has left except Victor and Margret, you can see a boom operator reflected in the door's glass panel. You can see him and it's even more noticeable when he lowers the boom for when Victor sits down. (00:04:05)
Visible crew/equipment: When Margaret is about to confront Victor with the truth about his reflexology, in the first shot that pans over to Margaret on the very left of the screen, a hand appears and pulls the door back. It can't be Jean as we see her leaving the room to go upstairs a few shots earlier.