Came across this whilst looking for something else.
Its a good video of the disco scan in action (I know a few people have asked about this device).
Further in, more examples of some of Hugo's amazing colour work - whitest whites and deepest reds.
http://uk.youtube.com/watch?v=MYtn_3sB1WE&feature=related&fmt=18
Saying that it could be the Dazzler as its being reflected from the mirror ball. Maybe Bill could clarify when he sees this.