How did Henry die in the good son?

In "The Good Son," Henry, portrayed by a young boy named Matthew, dies as a result of a tragic accident orchestrated by his cousin, Mark. During a tense scene, Mark saves Henry from falling off a cliff, but in a moment of desperation, Henry pulls Mark down with him. This struggle leads to a fatal fall, resulting in Henry's death, which serves as a pivotal moment in the film that highlights the themes of good versus evil and the complexities of familial relationships.