Finn Vincible is the founder and star of the stunt man internet series Stunted Growth. On said show he would often perform dangerous stunts and irritate other people with pranks.
His fellow crewman Rudy was often the butt of his jokes. In 2016, Finn went TOO FAR by sleeping with Rudy's girlfriend Stasha; though he lied about not going all the way, unintentionally getting her pregnant. In 2017, following Rudy and Stasha's marriage, she gave birth to Finn's son; not Rudy's child. This was the final humiliation for Rudy, who snapped and decided to use Finn's next stunt to kill him.
Finn found an old high school girlfriend as part of his next stunt; to make up for a haunted hayride he never took her on. Said woman, and her husband, watched in annoyance as Finn went for the stunt, only to catch fire and burn to death.