After the September 11, 2001 attacks in New York City, Conroy participated in relief efforts by volunteering to cook for police officers and firefighters. During an audio commentary on ', Conroy expressed his surprise at the reaction of the emergency service workers to his presence. At the behest of another cook, Conroy called out from the kitchen to the dining area in his "Batman voice", reciting the iconic line, "I am vengeance! I am the night! I am Batman!" (from the "Batman: The Animated Series" episode "Nothing to Fear") This was greeted by cheers and applause from emergency service personnel, many of whom had been fans of "Batman: The Animated Series" during its airing in the 1990s. Conroy confessed to being humbled and deeply flattered by the reaction.