This fan-made video got an enthusiastic thumbs up from Damon Lindelof, who tweeted, “Person who made this? You complete me.”
It shows the scene with Jack and Rose on flight 815, with the Season 1 flashback version on the left side of the screen, and the season 6 sideways version on the right:
It’s by Neil Pomerleau
Wow! That sure is revealing seeing the two scenes side by side like that. Did you notice that Jack was still hanging on tightly in the second scene almost to the point where in the first scene the air bags started coming down?
Good observation! That must be more leakage between the timeframes.