In Rafa's room there is a poster of Indiana Jones and the Kingdom of the Crystal Skull (2008), a character that Nobody will talk about later.
The first word Daria says is in Italian like the first word Nobody says.
In the self-help group room, the flag in the background resembles the flag that appears in the church of one of the self-help groups in Fight Club (1999).
When they are at the river eating the sandwiches, Nobody is sitting on a sundial. Nobody has two watches at a time, one in his pocket and one on his wrist. Rafa always has two, and on his nightstand he also has two clocks.
The phrase that says that tomorrow is what is always expected and never comes is said by the Joker from the '66 Batman series.