Skipper David John Marley used to sail the rivers of the world for the Jungle Navigation Company at Disneyland. Now a history professor, he's compiled "Skipper Stories" - two volumes of the best jungle cruise stories money can buy.

Marley sits down with Nathan to chat about what it takes to be a great skipper, looking at the Jungle Cruise from a historians perspective, and the greatest pranks he ever pulled on the job.