Connections

Clip shown

shows cast, crew, locations, and some video of "gag clips" (i.e., outtakes) from the shooting of the film

Wall of boxes - collecting memories (mentioned in commentary).

title reference

After they pick Jonathan from the railroad station, the car passes the (in)famous staircase.

The way Alex feet are filmed before his dance scene

He has the same kind of glasses, but mostly his fear of dogs. In Sin City he is eaten by a dog.