Damn that's fucked up. Probably didn't even want a haircut and just wanted to hurt someone. They'll find that piece of shit.
Crazy, I think there is more to the story...because a dude just doesn't carry a blade on the off chance he wil be denied a haircut...like a lot of barbershops, they are fronts for drug dealing and other shit. And barbers are known for their shadiness...
I think that they have had dealings with one another, as cutting someone is personal...or that there is a mutual third party. What would dude have done if the barber said yes?