Back To The Future - Where's the Hair Dryer?
In the scene where Marty tries to scare George into asking Loraine to the dance by dressing up as a space man from the planet "Vulcan", you'll notice that Marty has a hair dryer tucked in his belt, but when the camera cuts away then back to Marty, you'll see that the hair dryer is gone...It switches back and forth a few times. This also brings up another question, "How did Marty get a hair dryer? because in 1955, there were no hair dryers." Well, the answer is simple. There was a scene that was cut out that shows Doc packing a suit case with items he may need if he traveled through time. Doc, in 1955, looks at the hair dryer and says "What's this contraption?" Marty replies, "It's a hair dryer", Doc snips "Why would someone need a hair dryer? Aren't there towels in the future?" The proof to this is on the video "Secrets of the Back To The Future Trilogy"
Back To The Future, the home video