"My mum screamed, ran away and woke up my dad," actor Harry Lawtey said of the prank It seems that Joaquin Phoenix lived up to his Joker: Folie à Deux character's name on set. While speaking with Variety about the upcoming comic book movie sequel,

Folie à Deux” co-star Harry Lawtey told Variety that the Oscar winner couldn’t stop coughing after doing Arthur’s maniacal chuckle. “To watch him do that laugh and to see the effect on him — on everyone — blew my mind,

Folie à Deux, recalled the time he and Joaquin Phoenix played a trick on Lawtey’s mom on the movie set. Phoenix stayed in full Joker makeup on set, even when not filming, so Lawtey said the actor played a trick on his unsuspecting mom.