As the bank manager who works for the mob, William Fichtner pulls out a Remington 870 shotgun from under his desk and shoots one of the clowns in the back; he then proceeds to shoot at the other two in the lobby, one of which is the masked Joker.
William Fichtner and his very nice suit is from Saturday Toys "Men in suits" series. He also come with extras such as shades and cell phone (Remington 870 Shotgun NOT included)
Bank Manager: "The criminals in this town used to believe in things. Honor... respect! Look at you. What do you believe in, huh? What do you believe in?!"
[The Joker kneels down, grabs the manager's face, and sticks a grenade attached to a string into his mouth]
The Joker: "I believe whatever doesn't kill you simply makes you..." [Joker takes off his clown mask for the first time, to reveal the horrific scars that extend his mouth into a giant grin] "...stranger."
Other men in suits: Daniel Craig as James Bond 007, Sean Connery as Henry Jones Sr, Christian Bale as Bruce Wayne, Brandon Routh as Clark Kent, Matt Damon as Jason Bourne, Hugo Weaving as Agent Smith, Jean Reno as Hubert Fiorentini in "Wasabi", Robert De Niro as Neil McCauley in "Heat" and Brad Pitt as Detective David Mills in "Se7en"