Vigilante justice is a great thing. When a regular citizen stops a crime from happening, we can't help but applaud them and ridicule the would-be criminal. But this...this is a whole new level of vigilante justice.
This guy was attempting to break into a Mercedes parked on the street. His idea was to grab a brick, throw it through the window and drive away victorious. That plan, though, was short-lived. The "boomerang brick" returned as quickly as he threw it. But it didn't return to his hand. It instead smashed him directly in the melon, knocking him out instantly.
Those are some tough windows on that Benz!