There is a fascinating connection between Source_Code (2011) and Donnie_Darko (2001). Both movies are about the protagonist in alternate realities.
Source Code (2011) Official Trailer - Jake Gyllenhaal https://www.youtube.com/watch?v=mnJegNyAb1w
The Nightmarish Delirium of SOURCE CODE Explained https://www.youtube.com/watch?v=IktseUs3TZg , https://www.facebook.com/FilmComicsExplained
In SC, it is revealed that the protagonist is essentially inside a brain in a vat scenario. His consciousness is eventually transferred into an alternate reality, where he is fully intact.
https://www.digitalspy.com/movies/a333566/source-code-the-movie-make-up-of-jake-gyllenhaals-thriller
https://thefilmsmith.com/2011/04/01/source-code-a-genuine-sci-fi-thriller
https://reelrundown.com/movies/Movies-Like-Source-Code
https://www.thereviewgeek.com/10movies-sourcecode
DONNIE DARKO Trailer (2001) | Jake Gyllenhaal, Sci-Fi https://www.youtube.com/watch?v=b7Wybiuvq3g , https://www.youtube.com/c/joblo/videos
DONNIE DARKO: Is It Deep or Dumb? – Wisecrack Edition https://www.youtube.com/watch?v=xksMpeMHbTE
Donnie Darko Explained: The Ending & What It Meant https://www.youtube.com/watch?v=_ZrPYryNhWs The Take
https://thedigitallabyrinth.blogspot.com/search?q=Source+Code
https://thedigitallabyrinth.blogspot.com/search?q=Donnie+Darko