Towards the end of the film, Jennifer Aniston's character lets a prospective art collector, played by Ivan Sergei, into the apartment to look at a large art installation.
It is a massive wood block bolted towards the ceiling in the entry hall of the apartment.
I've tried to find any info about this piece. I can't even find a movie still on the internet, but I captured an image from my TV:
Would anyone know the artist of this piece? I'm guessing maybe they are a native of Chicago.