When Jerry imagines himself and Kramer as the only ones not married, he explains how terrible the idea of a periscope in the car is and he has his glasses in his hand. As the shot goes behind Jerry, the glasses are on his face.
The footage of couples at the beach when Jerry (Jerry Seinfeld) is on the pier contemplating marriage is the same footage that was shown in episode 7.1, The Engagement (1995), when George (Jason Alexander) asked Susan (Heidi Swedberg) to marry him.
The doctor could only discuss Susan's death with her next of kin, meaning her parents not with George who wasn't her husband.
Kramer says that the "bank down on the corner" will give you $100 if no one says "Hello" when you enter. The exterior of the bank is in the next scene, and it is sandwiched between two buildings and not on a corner.