Arguably Batman's only humorous moment in the entire film comes when Selina Kyle gives Bruce a dose of is own medicine by disappearing when The Dark Knight turns his head. He reacts by growling, "So that's what that feels like." Making reference to the numerous times in which Batman suddenly disappears on whomever he happened to be talking to, this line also quotes a DC comic titled "Kingdom Come." The only difference between the two occurrences is that the one doing the disappearing in Kingdom Come is Superman. Either way, it's fun to see Batman get the short end of the "this-conversation-is-now-over" stick.