Jason,

Yes, I found it interesting that that was their first comment on what was going on,,, they discarded it too in favor of actual time travel/tangent contact. But what amazed me is how thought provoking this movie is to viewers,..It’s not your usual teen flic.

“Lets assume it's an attraction. We would therefore see the particles approach one another, but would an observer on the other side of the barrier see this? As his time runs backwards, he would see the objects move apart. Yet to him it is our time that is running backwards and so he would reason that objects on different sides of the light barrier must have a mutual repulsion. Similarly, if we begin by assuming that such objects repel we will find they attract for the observer on the other side of the light barrier”

Still wrapping my brain around this one the wordage confuses me he seems to be going in a circle (or conflicting himself) when he states “Yet to him it is our time that is running backwards” and ending with his beginning, -in that net result, - both sides of the barrier (if it is repulsion) would perceive the other side to be moving backwards.

I used to love to try to wrap my brain around physics (years ago) I miss it. I’ve never read much in conjunction with time travel possibilities, just as it relates to current beliefs that within a black hole there can be no ‘time’ etc. Einstein’s approaching speed of light, - time would slow etc.
I need to get back to some of this and the current leanings. I love it.