Hey, this is something that's been bugging me since Tabula Rasa, and I haven't found any mentions of it, so I thought I might as well come straight to the source, to make sure I'm not just seeing something that isn't there.

In the last shot of TR when the camera spins around Locke and shows us his face, his eyes are kind of yellowish and freaky-looking, different to what they normally are, and the soundtrack suddenly takes on a menacing tone, as if there is something sinister about Locke. Also, I think I hear a sound effect which is reminiscent of the scary sound the "Predator" makes. :o ???

After seeing that, I realized there was something similar in the scene where Boone gives Jack the pens about 8 minutes into the first episode. When Jack walks away, the camera stays on Boone's face and his eyes seem to have that same yellowish look, but later his eyes are a totally different color. And the menacing soundtrack appears here as well for a few seconds, only not as noticeable. So the implication by this seems to be that something on the island is hopping over from body to body, and the way you can tell that someone is "possessed" by this entity, is by the yellow freaky eyes.

So I guess what I'm asking is.. is there anything to this Invasion of the Body Snatchers theory of mine, or did my eyes just play tricks on me?

I think you, my friend, have been watching with "freaky eyes."

Or you need a new TV.