Martinez is known for his ability to play characters with a "civilized" exterior that masks a darker interior. In Relatos Salvajes, he uses:
What makes Martinez’s performance worthy of a long article is the architecture of his rage.
He rarely raises his voice, making his willingness to corrupt the justice system feel even more sinister.
: The "deep" impact of Martínez's performance occurs when Mauricio realizes he is being swindled by his own conspirators. His cold, professional veneer cracks, leading him to momentarily consider letting his son face the consequences—not out of a sudden moral awakening, but out of frustration with being exploited by "lesser" men. Class Warfare
Then comes the explosion. Mario commandeers a police car, drives it into a restaurant, and proceeds to drag the groom out onto the dance floor. But the genius of Oscar Martinez is that he never stops being Mario . Even as he commits an act of "savagery," he looks terrified. His voice cracks. He is not a hero; he is a desperate man drowning in his own adrenaline.