Name the film

I need help rmembering this film. All I remmeber is too little bits reminded to me from watching the dark knight.

Firstly this guy gets the left side of his mouth slashed by someone so he gets a bandage put over the cut. Later he drink some scotch and it stings him and the bandage stains with scotch and blood. And later he takes the bandage off and he has a crazy giant half smile.

No problem.

Feeling stupid after realizing something seems like a natural reaction. Don't worry.

I'm glad I was able to help.