The shot from The Lady Vanishes I am talking about is when Iris looks back to say goodbye to her friends after getting clonk on the head. She was feeling dizzy when she got on the train.
Can you let me know the actual name of this effect or how Alfred Hitchcock shot this? This is for my research project. I thought it was interesting since I do not see this in modern films. Does anyone know if Alfred Hitchcock was the first person to use this in movies as a transition?