CNN reports that a scene that was to be filmed in Hong Kong for "The Dark Knight" has been cancelled.

The reason however is unexpected - pollution in Hong Kong's iconic harbor means that the water quality could pose a potential health risk.

The scene in question would have Batman dropping from a plane into said harbor and then climbing out. The action will now take place inside a building.

Meanwhile, Heath Ledger recently talked with The New York Times about his role as The Joker which he describes as a "psychopathic, mass-murdering, schizophrenic clown with zero empathy."