Madness as you know, is like gravity. All it takes is a little push "The Joker"

You want to know how I got these scars? My father was a drinker and a fiend and one night he goes off crazier than usual. Mommy gets the kitchen knife to defend herself. He doesn’t like that, not one bit. So, me watching he takes the knife to her, laughing while he does it. He turns to me and he says “WHY SO SERIOUS!?”. He comes at me with the knife “WHY SO SERIOUS SON!?” Sticks the blade in my mouth "lets put a smile on that face!"

Even though he's just a character in a movie or comic book,i want to meet him in a person and laugh with all my madness and fear.The Joker is a fictional character, a comic book supervillain published by DC Comics. He is the archenemy of Batman, having been directly responsible for numerous tragedies in Batman's life, including the paralysis of Barbara Gordon and the death of Jason Todd, the second Robin. Created by Jerry Robinson, Bill Finger and Bob Kane, the character first appeared in Batman #1 (Spring 1940).
Throughout his comic book appearances, the Joker is portrayed as a master criminal whose characterization has varied. The original and currently dominant image is of a highly intelligent psychopath with a warped, sadistic sense of humor, while other writers have portrayed him as an eccentric prankster. Similarly, throughout the character's long history, there have been several different origin tales; they most commonly depict him as falling into a tank of chemical waste, which bleaches his skin white and turns his hair green and his lips bright red, giving him the appearance of a clown. He has been repeatedly analyzed by critics as the perfect adversary for Batman. Their long, dynamic relationship often parallels the concept of yin and yang.
The Joker has been portrayed by Cesar Romero in the Batman television series, Jack Nicholson in Tim Burton's Batman, and Heath Ledger in Christopher Nolan's The Dark Knight, which posthumously earned Ledger the Academy Award for Best Supporting Actor. Larry Storch, Frank Welker, Mark Hamill, Kevin Michael Richardson, Jeff Bennett, Corey Burton, John DiMaggio, and Brent Spiner have provided the voice for the character in animated form.
As one of the most iconic and recognized villains in popular media, The Joker was ranked #1 on Wizard's list of the 100 Greatest Villains of All Time.He was also named #2 on IGN's list of the Top 100 Comic Book Villains of All Time List, was ranked #8 on the Greatest Comic Book Characters in History list by Empire (being the highest ranking villain on the list) and was listed as the fifth Greatest Comic Book Character Ever in Wizard magazine's 200 Greatest Comic Book Characters of all Time list, also the highest villain on the list.On their list of the 100 Greatest Fictional Characters, Fandomania.com ranked the Joker at number 30.

The Joker commits crimes with comedic weapons such as a deck of bladed playing cards, an acid-squirting flower, cyanide-stuffed pies, exploding cigars filled with nitroglycerin, harpoon guns that utilize razor-sharp BANG!-flags, and a lethally electric joy buzzer. His most prominent weapon is his Joker venom, a deadly poison that infects his victims with a ghoulish rictus grin as they die while laughing uncontrollably. The venom comes in many forms, from gas to darts to liquid poison, and has been his primary calling card from his first appearance. The Joker is immune to every known venom as well as to his own laughing toxin; in Batman #663, Morrison writes that "being an avid consumer of his products, the Joker's immunity to poisons has been built up over years of dedicated abuse".
The Joker is portrayed as highly intelligent and skilled in the fields of chemistry and engineering, as well an expert with explosives. From his first appearance onward, he has been consistently portrayed as capable of hijacking broadcasts - usually news programs - of both the television and radio varieties. In a miniseries featuring Tim Drake, the third Robin, the Joker is shown kidnapping a computer genius, and admitting that he doesn't know much about computers, although later writers have portrayed him as very computer literate.
The Joker's skills in unarmed combat vary considerably depending on the writer. Some writers have shown Joker to be a very skilled fighter, capable of holding his own against Batman in hand-to-hand combat. His versatility in combat is due in part to his own extensive array of hidden gadgets and weapons on his person that he often pulls out on a moment's whim (rolling a handful of explosive marbles on the ground, retractable knives attached to his spats, etc.); other writers, on the other hand, prefer portraying Joker as physically frail to the point that he can be defeated with a single punch. He is, however, consistently described as agile. Joker's skills in combat also differ in the film and television adaptations.
The Joker has cheated death numerous times, even in seemingly inescapable and lethal situations. He has been seen caught in explosions, been shot repeatedly, dropped from lethal heights, electrocuted, and so on, but he always returns once again to wreak havoc.
Over several decades there have been a variety of depictions and possibilities regarding the Joker's apparent insanity. Grant Morrison's graphic novel Arkham Asylum: A Serious House on Serious Earth suggests that the Joker's mental state is in fact a previously unprecedented form of "super-sanity," a form of ultra-sensory perception. It also suggests that he has no true personality of his own, that on any given day he can be a harmless clown or a vicious killer, depending on which would benefit him the most. Later, during the Knightfall saga, after Scarecrow and the Joker team up and kidnap the mayor of Gotham City, Scarecrow turns on the Joker and uses his fear gas to see what Joker is afraid of. To Scarecrow's surprise, the gas has no effect on Joker, who in turn beats him with a chair. In Morrison's JLA, the Martian Manhunter, trapped in a surreal maze created by the Joker, used his shape-shifting abilities to reconfigure his own brain to emulate the Joker's chaotic thought patterns. Later in the same storyline, Martian Manhunter uses his telepathic powers to reorganize the Joker's mind and create momentary sanity, albeit with great effort and only temporarily. In those few moments, the Joker expresses regret for his many crimes and pleads for a chance at redemption. However, during Batman: Cacophony, the Joker is again rendered sane when he is dosed up on painkillers after being fatally wounded by Onomatopoeia, and, during a subsequent conversation with Batman, although expressing regret for the loss that motivated Batman to never allow people to die if he could help it, informs the Dark Knight that he does not hate Batman because he is crazy, but is crazy because he hates him, stating that he will only "retire" when Batman is dead.
In Elseworlds: Distant Fires, the Joker is rendered sane by a nuclear war that deprives all super beings of their powers. In Batman: Legends of the Dark Knight #145, the Joker became sane when Batman put him in one of Ra's al Ghul's Lazarus Pits after being shot, a reversal of the insanity which may come after experiencing such rejuvenation. However, the sanity is only temporary, and soon the Joker is reverted back to his "normal" self.
The character is sometimes portrayed as having a fourth wall awareness. In Batman: The Animated Series,the Joker is the only character to talk directly into the "camera" and can be heard whistling his own theme music in the episode adaptation of the comic Mad Love. Also, in the episode "Joker's Wild", he says into the camera, "Don't try this at home, kids!" In the DC vs. Marvel crossover, he also demonstrates knowledge of the first Batman/Spider-Man crossover even though that story's events did not occur in the canonical history of either the Marvel or DC universe. On page five of "Sign of the Joker", the second half of the "Laughing Fish" storyline, the Joker turns the page for the reader, bowing and tipping his hat in mock politeness.