I too thought it was weird that Walt asked Michael if he was alone. If you were trapped and wanted to be rescued would you care if anyone was listening or reading your conversation. If it were me the first thing I would type is where I was and how he could come get me. Not ask him if he was alone. It seems like a trap to me.

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\"That thing out in the jungle...maybe it\'s a monster...or a pissed-off giraffe...\" - Hurley