Joaquin Phoenix, no doubt a method actor, got into character once more on the set of Joker: Folie à Deux; some of his character’s antics even transitioned into real-life scenarios. Harry Lawtey, in a recent interview with Variety,

Folie a Deux final trailer begins with the focus on Lady Gaga 's Harley Quinn, who tells Joker that she's been told that he is a bad influence on her. Some scenes include Harley walking up the steps of the courthouse with an angry mob shouting from the streets,

It seems that Joaquin Phoenix lived up to his Joker: Folie à Deux character's name on set.