[1] Jerry is on a plane returning to New York City when a drunk man, Gavin Polone, seated next to him falls sick.
He then holds a grudge against Jerry and Elaine for their earlier derisive remarks about Ellen, announcing an end to their friendship.
Jerry, tired of having to put up with Farfel, tries to contact Gavin, but finds out that he checked out of the hospital several days ago.
Gavin claims he was diagnosed with Bell's Palsy, the reason he could not call earlier, and comes for Farfel, much to the relief of Jerry and Elaine.
In a deleted scene, Kramer reveals that he fed Farfel Turkish Taffy, which would have explained the dog's erratic behavior and frequent barking.
If you see two life-forms, one of them's making a poop, the other one's carrying it for him, who would you assume is in charge?This has been quoted (and mis-quoted) enough to permeate the culture, approaching catchphrase standards.