He promises to build a doghouse. He even has a tool belt, and buys some wood.
And then he stares off into the middle distance, or sits at a table writing letters of complaint to Starbucks, to Mayor Michael Bloomberg, to American Airlines. These are major accomplishments in his day.
Greenberg, then, is about what happens when this one-man pity party meets his brother's and sister-in-law's personal assistant, Florence Marr (Greta Gerwig). In her 20s and experiencing her own shoulder-shrugging tremors of ennui, Florence is pretty in a lumbering sort of way, and the moment when the two of them - Greenberg and Florence - go back to her place for a late-night drink has to be one of the most unromantic and uncomfortable sex scenes in the history of motion pictures. It's a ballet of wrongheaded aggression, numb compliance, awkward miscues - and then it's over. Ouch.
A lot of Greenberg is like that scene: lacerating, keenly observed. Baumbach, whose The Squid and the Whale looked at the dissolution of a marriage from the perspective of a super-bright teenage son, and whose Margot at the Wedding offered a symphony of psychological cruelty and familial pain, is at it again. There's comedy here, to be sure, but it's steeped in neuroses and narcissism, and it's easy to lose patience with Greenberg and his mopey, medicated irony.
Well, I'll correct that: It's easy to want to lose patience, but Stiller's portrayal is so acutely real, Baumbach's writing so cutting and specific, and the work of Gerwig (of such mumblecore fare as Hannah Takes the Stairs and Baghead) so seemingly effortless that Greenberg makes you, if not happy to stick around, then at least agreeable to the idea.