A man describing coffee descriptors for an hour and a half

This is a rare 90-minute-long video of an emeritus professor describing coffee descriptors.

If you are not sure what a coffee descriptor is, you have 90 minutes in which to figure that out. After that, you are free to continue the effort unassisted:

BONUS: Professor Kenneth Liberman, of coffee descriptor descriptions fame, describes “turn-taking in the surfers’ lineup“.