Director Todd Phillips considered the character's body size as one way to represent his vulnerability. It is important to emphasize that unlike most people who diet to lose weight or who develop an eating disorder, Phoenix's weight loss was intended for the short amount of time it took to shoot the movie.
Pseudobulbar Affect (PBA) is a condition in which a person cannot control their laughter or crying. In this case, Arthur had a symptom where he couldn't control his laughter. The condition of Arthur Fleck who suffers from Pseudobulbar Affect (PBA) is evidenced by several scenes in the film.
In addition, we can assume that Arthur suffers from pseudobulbar affect, or emotional incontinence, which is a disorder of regulation of emotional expression, caused by neurological disease or injury affecting the brain.
I think it's an aesthetic choice - by making Joker very slim and scrawny, he's less physically imposing, which accentuates his other frightening qualities such as unpredictability and lack of conscience.
2 Joker's Danger Has Nothing To Do With His Muscles
If it can be used to kill someone, Joker is proficient with it, but none of that makes him strong. The Joker can take a beating, but that's more because he doesn't care about anything but the punchline. He's unpredictable, but he's not exactly powerful.
According to the Joker, his wife (who often mentioned that he needed to "smile more") found herself in trouble with gambling sharks who "carved her face." As the pair couldn't afford surgery, and in an effort to reassure his wife that he didn't care about her scars, the Joker disfigured himself in solidarity.
The Joker (or Arthur) appears to have a complex mix of diagnoses, including pseudobulbar affect – a rare condition consisting of uncontrollable laugher or crying, and possibly a psychotic illness, evidenced by his apparent hallucinations about the subject of his affections (played by Zazie Beetz).
Everyone knows Harley Quinn as the Jokers' girl, but how did she become Harley Quinn? Personality Disorder, specifically, Histrionic Personality Disorder plays a key part in Harley Quinn's life.
Also in those records are some newspaper clippings that reveal Arthur was three years old when the authorities learned that his mother's boyfriend abused them. This puts Arthur's birth year in 1948 or 1949, meaning that he was 32-33 years old during the events of the film.
The laughter appears to be an expression of Arthur Fleck's inner turmoil, and triggers whenever he feels stress, or else attempts to express the truth of what he's actually feeling.
Later, Arthur goes to Arkham State Hospital and steals his mother's records, and finds out that he was in fact adopted, and that Thomas Wayne is not his father and that Penny is not his true mother.
The teeth are wind-up prank teeth that giggle and hop around in a small radius where they are left. The teeth, when broken, break in half and their laugh box detonates. Joker Teeth, also known as Chattering Teeth, are mechanical gag teeth used by the Joker.
But Phoenix, who has been vegan since the age of three and is a vocal animal advocate, wants this to change. Alongside PETA, the actor notes that turkeys are abused in the meat industry.
Mad Love introduces Harley Quinn as a former psychologist named Harleen Quinzel who fell in love with the Joker during her internship at Gotham City's Arkham Asylum and details her transformation into the Joker's villainous accomplice Harley Quinn, as well as the Joker's lack of respect for Harley.
Borderline personality disorder is one of the most painful mental illnesses since individuals struggling with this disorder are constantly trying to cope with volatile and overwhelming emotions.
Originally Answered: Why did Joker kill his own mother? Because his mother lied to him about the fact that Thomas Wayne wasn't his father. After stealing some files from Arkham, he finally learned that he was adopted, and that his mother abused him maliciously as a child.
Thomas Wayne is a good man. Penny Fleck about Thomas Wayne. Penny Fleck was the adoptive mother of Arthur Fleck, a mentally unstable failed comedian who would later call himself the Joker. Much like her son, Penny suffered from an unspecified mental illness.
In the documentary I Am Heath Ledger (via Digital Spy) it's revealed that, in order to keep the prosthetics in their place as they got loose when he spoke, Ledger had to lick his makeup to keep it in place, and it ended up becoming part of the Joker's manic personality, as well as his most memorable mannerism.
The Joker's Face is the result of the Joker having had his face surgically severed from his head. Since then it had shifted many hands from character the character in a variety of different stories.
In the documentary "I Am Heath Ledger" (via Far Out), it was revealed that the silicone pieces would sometimes come loose, prompting the actor to keep licking his lips to make sure they stayed in place. Eventually, Ledger embraced the licking and made it part of his character's mannerisms.
