Ha! I have a theory.

The Electromagnetic station is causing the survivors to have awkwardly timed flashbacks. This Electromagentism might also pull heartstrings and cause a feeling of guilt. Certain vibrations and sounds are utterly capable of this and you wouldn't even hear it necessarily. Consider that the US army has now weaponized a version of this.

We know that Ana Lucia did not appear to be remorseful until she got to the other side of the island and had her first flashback.

This could be why The Others are not fond of hanging out on that side, even though there is a bounty of stuff they could use. They know that they would be weak if they started to attack and had a flashback. How embarassing.

I was just thinking that it would be interesting if the flashbacks themselves are a symptom of something.
Maybe every 108 minutes someone has a flashback?

Hurm, better luck next time with theories, eh?

Interesting. While I was making a video a little while ago, I used the audio from a two clips. One was when Kate shot up the bank vault and the other was when Sawyer made Kate read his letter, there was a low frequency hum like when Jack leaned to close to the wall in the hatch and his key moved towards it. I thought it was something I did and then felt maybe it was connected to the sound in the hatch. So I'm interested in seeing what some others might have to say on this.

Now granted the bank thing didn't happen on the island but the humming was there. I'm not losing it I swear :)

Consider that the US army has now weaponized a version of this.

? er... they do? that's a little creepy...

This link is interesting as hell in Lost terms.
[ ] = my interjection
http://www.forteantimes.com/articles/153_sonicweapons.shtml

"The effects of this specific frequency were confirmed, independently, by the work of engineer Vic Tandy while attempting to demystify a ‘haunting’ in his Coventry laboratory. This ‘spook’ was characterised by a feeling of unease and vague glimpses of a grey apparition. A spot of detective work implicated a newly installed extractor fan that, Tandy found, was generating infrasound of 18.9Hz.

Tandy believes that ‘ghost hunters’ could benefit from investigating the
infrasound frequencies at other ‘haunted’ locales. Not only does the 19Hz frequency create visual disturbances by vibrating the eyeball –[!] hence the shimmering appearance of apparitions – but the frequency could also stimulate a psychological sense of disquiet (hairs on the back of the neck rising and so forth). Even the ‘drop in temperature’ associated with spectral manifestations could be an effect of infrasound: “It does not cause a measurable drop in temperature of the air,” says Tandy, but “the effect is caused by a reaction in the body.” "
Also,
" There is good reason to believe, then, that exposure to certain infrasound frequencies could stimulate aggression [perhaps the Others act aggressively because they are at a distance from it?] and exacerbate psychological disturbances [like flashbacks?]. This might explain accounts of ‘temporary psychosis’ associated with some natural phenomena, such as the Mistral (in the Rhone Valley) and the Sirocco (off the Sahara), the famous winds that are said to create periods of momentary insanity [!]. That certain gusts of wind have infrasound frequencies has been documented. "

Check the link. It's the answer to all the mystery...er, maybe not, but a lot of it anyway. I didn't even put some of the most pertinant stuff on here. I might as well have put the whole thing.

Hell, just this last one and then off to research with you...

"Unsubstantiated reports suggested that infrasound weapons, built and tested in the 1970s, went badly wrong, resulted in wide-scale devastation within a four mile (6.4km) radius including uncontrolled killing sprees. I have seen no evidence yet to back up this rumour. Vic Tandy suggests that a broadcast infrasound weapon would, indeed, “cause more trouble than it is worth.” He explains: “In open air, the energy required to drive it is enormous and the effects unpredictable, ranging from serious harm to very little depending on the individual targeted. Directing infrasound is difficult because of the long wavelength, so if the weapon is to be activated by a person holding it, it would be hard to protect them from the sound. Direct contact with the weapon might also pose vibration problems for the operator.”
[Perhaps this is the reason for all the cement?]







I have a theory...
The vibrations will trigger a musical episode.

It might also explain the "incident" mentioned by Dr. Marvin Candle...

Shepherd, I think I love you! This is exactly the kind of thing I've spent endless hours on these sites hoping someone else would find for me... WOW!

The characters aren't literally having flashbacks. To them, it's just a memory and they are probably only remembering the gist of it in a few moments time, whereas we get to see what actually happened in detail. That's my take on it anyway. Plus I don't see how they are awkwardly timed. They are usually relevant to what's going on in present time, thus the reminder.

Unsubstantiated reports suggested that infrasound weapons, built and tested in the 1970s, went badly wrong, resulted in wide-scale devastation
...an "incident"?

“In open air, the energy required to drive it is enormous
...perhaps requiring a power cord from offshore?

The characters aren't literally having flashbacks. To them, it's just a memory and they are probably only remembering the gist of it in a few moments time, whereas we get to see what actually happened in detail. That's my take on it anyway. Plus I don't see how they are awkwardly timed. They are usually relevant to what's going on in present time, thus the reminder.

I was attempting what we humans call "levity".