Sword Fighting Stickup -- Store Clerk Has A Bigger Blade

Everyone knows you don't bring a knife to a gun fight ... but these robbers just learned you don't bring a machete to an Arabian sword fight.

When two ski mask wearing thieves tried to rob a convenience store with a machete in Pittsburgh, the cashier, Jewad Hayih, sprang into action like Jake Gyllenhaal from "Prince of Persia" ... chasing them off with his even bigger blade.