what was that thing that fell on to the island at the end of season 2 it looked like a sign but what was written on it [and how does a sign just fall out of the air and from where]
When Desmond turned the key and the sky went purple and the hatch imploded there were alot of things flying around. It was probably the hatch door that read quarantine.
its the hatch door that Locke worked so hard to get open in the 1st season...it was presumably blown into the air when the magnetic anomaly in the swan hatch imploded...