Your Lost prep for the evening: The Time Loop Theory. Spoilers.
All of the "werid" things that we see happen in seasons 1 & 2 of LOST are a result of the Losties now existing in the year 1996 on the island. This is why Locke can walk, and why Rose is Healed -- their bodies are now existing in a time prior to them contracting their illnesses. This is also why some characters, such as Walt, have extraordinary perception -- because they're technically from the future.
This is Lost as Primer (note the Primer timeline map).