This is the bag swap. this is the opening scene of Collateral and suspense is first created here.
The edited slow motion creates suspense as Tom Cruise is walking through the station.
Straight away the audience is aware that he is going to be the protagonist.
the close up of the bag illustrates that the bag is the key prop as the suited and booted appearance of the character symbolises he is high in his profession whether that is good or bad the viewers don't know.