...here's a "behind the scenes" shot from the B-camera, catching the A-camera being propelled down the corridor set. Since it as shot on an actual studio stage, TTI features a number of high-angle shots, as there was room to get the camera well above the tops of the sets.
Looks great! I especially like the honeycomb shadow on the wall. Overall, I really like the way these sets were lit. If I remember correctly, it was done by kids from the Austin School of Film.