If you think about it, the atmosphere in Apartment 3C is pretty eerie, especially its bathroom which contain obvious reference to Scarface (1983).
The final phone call with Sonny.
Sonny: Obviously you are suffering from hearing problems so I'll try again. WHERE'S THE GODDAMNED MONEY?! WHERE'S THE GODDAMNED STUFF?! AND WHERE'S MY CUT OF YOUR NEW ACTION?! You are making an idiot out of me, Tommy. And I'm not laughing yet.