This is a short documentary about how the zero and distorted gravity sequences were done in the movie Inception.
I love the way that it's REAL... I'm reminded of reporter asking us how many layers were in Sleepeater to achieve the water effects. He was rather shocked when we told him there was only ONE :-D
The custom made slip rings are pretty cool, what they don't tell you in the video are what each ring does...
By the looks of it the five big rings on the right are the three phases, neutral and earth conductors which supply power to the while rotating rig.
The rings on the left carry data to the control system onboard the rotating rig, judging by the number of rings I would say they are using ethernet.
Slip rings are a lot more elegant than the solution used for the carnival ride in this video: