Or dead, I can't remember what he said.
I think it's cool that they're showing a parallel universe. First the clips moved backwards in time, then they moved forward, and now they move sideways. Neat. The "it worked" means there's some way they'll become aware of the alternate reality. And obviously Earth-2 Jack remembers some of Earth-1. Desmond being in the plane was kind of a stretch, but since his disappereance was so abrupt I think there's probably something else to that. Being immune to time travel paradoxes, maybe he fully remembers Earth-1.
