Same way that humans can see into a darker room through a window when you put your face up to the window and cup your hands around your eyes. You block out as

Same way that humans can see into a darker room through a window when you put your face up to the window and cup your hands around your eyes. You block out as much reflections as possible, and then the camera can increase exposure significantly. It looks dark to us since there's not much light coming through, but there still is some light. So if you take a photo over the course of a second or two, that tinted window suddenly appears transparent. (Same idea as when taking photos as night).