There are many great scenes, but the most recent one I've seen was in another Christian Bale movie called Harsh Times, he and his buddy are sitting at a table trying to sell a gun to some Mexican pimp in a creepy Mexican dive, when all of the sudden another dude comes out of nowhere and just gashes the pimp's neck wide open at which point he slumps to ground and is laying there while his remaining blood pumps onto the floor.