I am not going to read the spoilers, no i'm not...

To the sayings that Desmond was flying the helicopter: Wasn't he already flying it when they left the island? He is sitting next to Lapidus and is wearing the headphones. Cause I remember saying "Does Desmond actually know how to fly a helicopter?" when I watched the epi.

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- Does anyone know how to use a gun?
- I think you just pull the trigger.

- Hey kid, what's eating you?
- Nothing, he's at the top of the food chain!
(The Lion King^^)