She also "wrote" that scene, and caused the protests of the crew because they couldn't see where she was aiming at with the whole first part. Actually, if memory serves, Giorgio Grandi was asked (by AdV) to prepare a plot of that sort, which he did, only for her to do what she wanted anyway. He said in another forum that the cameraman called him mid session, protesting that they were wasting time with that extremely slow "buildup" on the bus.
Apparently at the time she was a big fan of that Japanese CNC porn.