I've been rewatching all the episodes recently and noticed that when Desmond turns the failsafe key in the Season 2 finale, there is a brief point when the screen go completely white (for like a second) then you see the effects of turning the key on the rest of the island. Season 3 "Flashes Before Your Eyes", right after Desmond is hit in the head by the cricket stick you see if again, and he is then on the island again...

This HAS to be related to the Season 6 finale right? Both white screens dealt with the hatch, or the electromagnitism surrounding it...and an explosion of some sort.

What can be made of this? any theories out there?

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