Kramer: Don't want to forget my briefcase.
Jerry: What do you got in there?
Elaine: Shouldn't he say "badbye"? Isn't that the opposite of "goodbye"? [...] Does he live underwater? [...] Is he black?
Kramer: Just trying to get ahead.
Comment: this episode signals a clear shift from everyday realism to something else. The plot could either be described as preposterous or downright fantastical. Still, it is a very, very funny episode: good dialogue, funny scenes, funny situations. There's self-referential meta-sitcom going on.