Scarface

Al Capone claimed that his facial scars were a war wound, and his bodyguard would chuckle at the comment.
“What are you laughing at?” said Al, and his bodyguard went silent.
The bodyguard was the one who had slashed Al for insulting his sister.
Years later, after Al died in prison, the bodyguard went out in the streets and found a kid in a gang.
“C’mere,” he said, and he slashed the kid’s face three times.
The kid’s mouth hung open, and then a familiar sneer came over his face.
“Nice knifework,” said Al. “Got a cigar and a light?”