I’ve seen this film countless times and it’s still revealing all of its secrets to me. It’s got a cult following and constantly leads to a deep discussion about timelines, time travel, parallel universes and destiny.
In the end, when Donnie realizes that his 28 days are up and the world is going to end, he lays down in bed, waiting for the jet engine. The next morning, two characters that shouldn’t know each other, wave as if they recognize each other, but don’t know from where. No one knows what it all means.