Guardians of the Galaxy: Vol. 3: James Gunn 'Didn't Think' He'd Finish Trilogy (Exclusive)

James Gunn chats with ET's Ash Crossan about directing 'Guardians of the Galaxy Vol. 3,' the final installment in the Marvel trilogy, in theaters on May 5. The director opens up about having to 'think about' accepting the offer to work on the film. Plus, James explains how the MCU's first F-bomb in 'Guardians 3' happened.