hat tips to ahem, D_MAGIK, and dump.fm "mystery room"
Update: Of course I should have recognized Spike's hands from the Cowboy Bebop intro. They passed through dieFlaneuse and GucciSoFlosy before weaving their way to the mystery room.
Update 2: Spike's hands, or Edward's? They seem too feminine to be Spike's but that credit sequence predated Edward. Faye's? Time for some fan page research.