Honestly, I see nothing of what you claim. The "bend" is nothing fancy and just some simple wobbly 2D distortion effect like Bulge or the Puppet tool with the only real question being whether it's applied pre or post the 3D layering. Conversely, the "fog" is just another semi-transparent layer and occasional over-exposure/ glow dumped onto the footage with the thresholds and intensity being animated to make it cover the scene more or less as needed. Additional color corrections to desaturate layers could be involved, too, to intensify the illusion. Given all that, there is no secret magic juice involved. It's just a matter of using a few effects in the right places and there simply is nothing here that would necessitate any expressions, looping particles or whatever.
Thanks a lot,
the puppet tool works perfect for what I was looking for, haven't used it before and it was never refered to at the things i found.