When Joe is talking to Joyce on the beach, he removes her sunglasses. The close-up of the glasses just before he removes them shows Joe reflected in the left frame (on the right side of the screen), but in the other lens there is a reflection of someone holding something just out of view - probably a reflector to throw more light on the scene.
When Joe and Joyce arrive at Intertect's office after leaving the beach, the shadow of the boom mic is visible on the wall behind them as they enter Joe's office. It moves away as they move to a different part of the office.