About this "The Simpsons" episode:

The Simpsons - Bart the Daredevil is the 8th  episode of season 2 and number 21.
The Simpsons go to a monster truck rally that features famous daredevil Lance Murdock. Bart immediately becomes enamored and decides that he wants to become a daredevil as well. Bart's first stunt ends in injury and despite the family and Dr. Hibbert's best efforts, he continues to attempt stunts. Bart decides to jump the Springfield gorge, but Homer gets wind of his plan and makes Bart promise not to jump it. Bart immediately breaks his promise and goes to jump the gorge anyway, but Homer stops him just in time and finally gets Bart to swear he will stop being a daredevil. Homer accidentally ends up having to jump the gorge himself, failing in the attempt.