Josh Pais: Hoyt Vaughn
Hoyt Vaughn : How the fuck do I know? Why does anybody do anything?
Arthur Fleck : [Arthur's on the phone to Vaughn, after the gun that Randall had given for protection falls out of his pocket while he was entertaining at a children's hospital] Arthur Fleck: Wait, please, I love this job.
Hoyt Vaughn : Arthur, I need to why you brought a gun into a kids hospital?
Arthur Fleck : Its a prop, for my act now.
Hoyt Vaughn : That's bullshit! It's bullshit! What kind of clown carries a fucking gun? Besides, Randall told me, you tried to fire a thirty-eight over him last week.
Arthur Fleck : Randall told you that?
Hoyt Vaughn : You're a fuck-up, Arthur, and a liar. You're fired!
[he hangs up]