When Dr Lewis goes to intubate the drunk who broke into his neighbor's house, you can clearly see that the blades of the laryngoscope are not in the patient's mouth. It's to the left side of his face, and the patient's mouth is not open.
Near the start of the episode, when the crazy patient strapped to the gurney leaves the trauma room and goes into the corridor, the camera moves past a door with a glass window. In the HD/widescreen version of the episode, the camera and boom mic and the operators of these can be clearly seen reflected in the glass.