A 'fanfic' is a fan - created work, often in the form of a story. 'A favour' could be the central theme or an important event in this fanfic. Maybe it's about a character doing a favour for another in a fictional world, like in a fantasy or sci - fi setting. For example, in a Harry Potter fanfic, it could be about one wizard doing a big favour for another wizard to solve a problem at Hogwarts.
Definitely not. 'Simple Favour' is a work of fiction. It doesn't draw from actual happenings. The story was crafted to offer viewers an interesting and thrilling narrative experience.
Well, one origin story of the Joker is that he fell into a vat of chemicals which disfigured him both physically and mentally. This accident was a turning point that made him the chaotic and unpredictable villain we know. He then developed his twisted sense of humor and a vendetta against Batman.
One back story could be that the joker was once a normal person but was driven mad by a series of cruel pranks played on him. Another might be that he was born into a chaotic and unforgiving family environment which shaped his twisted personality. And the third could be that he had a great fall from grace in a magic show gone wrong, turning him into the joker we know today.