What do you think actually happened between the two friends in Deborah Chow's "The Hill"? What is likely to happen to their relationship after this night at the hill? What does this film show us about truth and reality? How can this understanding of truth and reality be applied to our understanding of narrator and narrative?

You have to come to your own interpretation of the events portrayed in the film. There is no doubt that Jack's story and perspective contrast with Jill's at every turn. For example, he feels at the end of the story that he is trying to help her on the hill, while she, knocked off her feet, thinks he might have tried to violate her. It's almost impossible to know what really happened, and it's likely that their friendship will deteriorate after this night and they will no longer be able to be friends. Their realities are too different to allow their friendship to continue.
The film shows us that truth and reality depend on one's perspective. For example, Jill's reality is that Jack is a possible rapist, while Jack's reality is that he cares immensely for Jill and was only trying to help her. When one reads a narrative, one must always be aware of the perspective of the narrator, as the narrator is never faultless or omniscient. Instead, the reality the narrator presents is always biased and subject to questioning.