A lot of Austin residents consider Interstate 35 to be an existential crisis. If you drive far enough north, you might eventually hit the cursed town of Oklahoma City. Even though most of us would never make such a wretched trek, the Oklahoma noise rock quartet Chat Pile emerges from the depths, delivering their socially aware brand of sludge metal for fans that have been indoctrinated into the music blogosphere from their spotty at best college dorm WiFi. On yet another frigid Sunday night in Austin, fans of the outspoken loud rock act packed out the Red River Cultural District stronghold Mohawk for a thought-provoking excursion that pummeled attendees’ eardrums as well as giving a powerful message of social reform