It's Easter at the Hall house. The whole gang's gathered around the table for a delicious ham: Annie's parents; her younger brother, Duane; and even the infamous Grammy Hall, who eyes Alvy suspiciously and then, in one shot, pictures him as a Hassidic Jew.
When Annie's mom talks to Alvy, Alvy replies directly to the camera, placing the audience in the mother's position across the table. She doesn't get Alvy's humor.
In the middle of the meal, Alvy turns away from the table and confides in the audience directly. He basically says Annie's family is healthy-looking and super boring—in other words, nothing like his family.
Then, in a split screen, we see Annie's very tame family alongside Alvy's boisterous brood as they were when Alvy was a kid. Alvy's family is so overbearing that they take up 75% of the screen.
Then they cross the streams: Annie's mom asks Alvy's mom—across the split screen and across time—what the Singers are doing for the holidays. (Spoiler alert: They're fasting.)
Post-ham, Alvy comes across Annie's brother Duane in his room. Duane tells Alvy that sometimes when he's driving at night, he has an impulse to drive right into oncoming traffic.
Yikes. Alvy's understandably creeped out and tells Duane he has to go because he's "due back on the planet Earth."
Cut to Duane giving Annie and Alvy a lift to the airport. In the car. At night. Alvy looks terrified.