In The Dark Knight (2008), there's a scene where the Joker confronts a gangster named Gambol. It looks like he's just going to slice Gambol's cheek, but then Gambol ends up dead.
What actually happened?
Gambol had put a bounty on the Joker: $500k dead or $1 million alive ("so he can teach him some manners first").
The Joker starts as usual, by telling "the story" of his scars. During the story, the Joker's sticks his knife inside Gambol's mouth, obviously preparing to give him a similar scar.
Right before the story finishes, the camera angle changes. While looking directly at one of Gambol's henchmen, The Joker delivers his famous line ("Why so serious?") and there's a dramatic sound. It seems to indicate that the Joker followed through with his threat and sliced Gambol's face.
Afterwards, Gambol falls down and seems to be dead. He's not screaming or writhing in pain (like you'd expect from someone with their cheek cut open), but simply crumples to the floor.
What did the Joker do?
Did Gambol pass out from the pain of getting his cheek sliced?
Did the Joker decide to slice his throat instead of his cheek?
Did the Joker slice his cheek so violently that it went into his neck and killed Gambol?