This episode did have a lot of potential but unfortunately, it kind of fell flat on it's face. I've seen better episodes of this show, and I just wasn't feeling "it" while watching the episode. The story lines didn't really tie in in any way.
The 'yada yada' thing did have it's potential but it became very tired by the end of the episode. The Jewish/Dentist thing was pretty funny, especially the final scene which pretty much made the entire episode. It was also great to see Bryan Cranston on Seinfeld.
The Kramer/small people thing, I really didn't find funny. The story line failed to tie in with anything else and plainly: it just wasn't a great story line to begin with. Fair episode of Seinfeld.