Matt Damon chats with ET's Kevin Frazier at the Los Angeles premiere of 'Air,' which hits theaters April 5. The actor opens up about working with longtime friend Ben Affleck on this project and reflects on the 25th anniversary of 'Good Will Hunting.' Matt also previews what fans can expect from his next project, ‘Unstoppable,’ with Ben and his 'very famous spouse,' Jennifer Lopez. Plus, Matt addresses his ongoing 'feud' with Jimmy Kimmel and shares if they'll ever make up. Source