Dax Shepard is revealing that he got temporarily banned from Conan O'Brien's talk show after a disastrous interview in 2004. While speaking on Blake Griffin's Audible podcast The Pursuit of Healthiness, the actor said he was in the thralls of his much-documented substance abuse addiction when he sat down with Conan that fateful evening."Professionally, the only wreckage I really had while I was an addict was I went on Conan and I had done the pre-interview in a blackout and I woke up to the