I regret only starting to listen to the Lost Podcast only lately, as it is highly entertaining.
Anyhow, one interesting tidbit about Across the Sea: the tortoise on the beach with the Boy to be in Black was there not because of a deliberate staging of the event, but because they are protected animals and cannot be moved or touched. So, the tortoise chose to hang out there that day.
Of course, they decided to keep the tortoise in the shot---they could have angled the cameras away, they could have used computer technology to erase the tortoise from the shot, they could have used other trickery perhaps. But they liked it and perhaps thought it might mess around with the minds of the viewers. Or they just didn't care. Who knows?
Consider this your token Lost post du jour.