Kevin talks about being empty nesters, telling his son there is no Santa Claus, teaching him how to drive, Jimmy being on his show 'Hiking with Kevin,' who has been the most difficult guest, working with an organization called the Appalachian Trail Conservancy, doing caricatures of celebrities, and they show off an amazing one he did of Jimmy. Watch 'Jimmy Kimmel Live!' WEEKNIGHTS 11:35/10:35c on ABC. Stream on Hulu.