On the Final Outcome of Film Source Code

The doctor created a brand-new world (source code world) for him. As long as he doesn't die, he will go on forever, so that world is not an eight-minute world. The protagonist is forced to return to the real world every time because he dies in the source code world. In fact, this is a parallel world (source code world), and this world is realistic with the original world.

Moreover, the parallel world means that the two worlds will never be connected, so his future life will not involve the previous world. Finally, the blocked message sent by that person is in the source code world. Because of his gratuitous insertion, he had to stop the ongoing source code creation again.

I'm a little dizzy, can you understand. Just like looking in a mirror, the ghost will continue there.