Let me explain. An actor runs into an old mine, the camera is further in the mine to catch the action as the fellow runs into the entrance of the mine. It is a bright day outside the mine entrance, but the actor's shadow points away from the camera towards the door. That is opposite of what I think it should be, but of course the camera needs the light, right?
OK, what about an outdoors scene or show that depicts life in the late 1800's. The actors are outside talking over plans for catching the stagecoach robbers when I hear an airplane flying over head.
Also, the candles, matches, and oil lamps were a lot better back then, too. A fellow enters a dark room and lights a match and the whole room lights up. Same thing happens with candles and oil lamps. Both of which must have been at least the equivalent of a 100 watt light bulb or more.
There are a lot more instances like these but for now, I would like you to tell me what all mistakes you have seen in movies or any TV show. It is fun to look for modern stuff in movies and shows that are set a couple of hundred years ago. Now, make sure your shadows are pointing away from the light and have a good day, you hear?