Circular Structure
Ending the film where it started, or with a scene that echoes the opening. The repeat shows what has changed, or suggests the cycle will keep going.
8½
The film opens with Guido's dream of suffocating. It ends with the director inside the film ordering all his characters to dance together. Coming full circle settles something. Guido starts out paralyzed and ends up at peace with it. The film he couldn't make becomes the film Fellini made about not being able to make it.
Lost Highway
The film opens with Fred hearing 'Dick Laurent is dead' over his intercom, and it closes with Fred saying the same line into the intercom himself. The repeat suggests he is stuck in a loop he can't escape. What you thought was a crime story becomes a trap.

