This week we take a Freakin Flashback with Megadeth Guitarist Dave Mustaine. We talked with Dave in May of 2013 just before the band’s next album Super Collider was released in June. Mustaine, however, was in the Freak Nation in May to also help raise support for victims of a massive tornado in Moore, Oklahoma. Winds topped 200 miles an hour cutting a path through Oklahoma as much as two miles wide. Listen…