Why is it in Hollywood movies every time there is a vent or AC unit someone has fixed little ribbons on it? Is that a thing americans do? Why? The vent in this movie is close to the floor in the toilets of a train. This implies someone got on all fours ON THE FLOOR OF A TRAIN’S BATHROOM to stick those ribbons there for a reason i can’t even begin to comprehend.
I thought it was because cheap motels built in the 50s, would do that to show you how cold the ac blows
It would only tell you whether air is flowing, not whether that air is hot or cold.