OT: Shadow of a Doubt / The Magnificent Ambersons
The message boards for both these films are more or less dead, so I'm posting here since Uncle Charlie is, along with Norman, one of Hitchcock's great pyscho-killers.
I was looking at The Magnificent Ambersons on TCM this morning when the dinner scene came up, and it appears to me that the speech Joseph Cotton gives at the dinner table here is a likely influence on the chilling speech Cotton gives as the serial murderer Uncle Charlie in Hitchcock's Shadow of a Doubt, which came out the following year.
The camera angle, Cotton's vocal tone and position in the frame are nearly identical. Both scenes get to closer views of Cotton from the same angle, but while Welles cuts to the closer shot after a cutaway to another character, Hitchcock keeps the camera on Cotton as it creeps in closer and closer until Cotton breaks the fourth wall and looks directly into the camera.
An example of Hitchcock's borrowing and improving on existing scenes.
Shadow of a Doubt: https://youtu.be/HT-pgWIDLZY?t=49
The Manificent Ambersons: https://youtu.be/vA1fVHBWuBU?t=95