Due out next year, Batman: The Dark Knight is filming right now. Apparently, while testing a shot with the Batmobile, there was an accident:

Batman special effects man killed

Warner Brothers released a statement: “Warner Bros Pictures and the entire cast and crew of The Dark Knight are deeply saddened by this tragedy, and their hearts and prayers go out to the family and loved ones of the deceased.”

Here is the teaser trailer for the movie: Dark Knight trailer

More info on the Batmobile: How the Batmobile Works