hallucinations that save him from the jet engine smashing him to bits in his room. It's these same hallucinations that lead him on a journey of self discovery as well as educating him on the end of the world. Along the way he experiences major tragedies from the death of his girlfriend to many other horrific events. In the end, Donnie falls through a time loop, or warp, or what have you and sacrifices himself. You can easily see the similarities between Donnie Darko and Jesus, if you want to look at it that way. Jesus realized that without dying for people's indiscretions, they had no chance of survival. If Jesus would've decided to side step his fate, people would be doomed.
What happened. The audience learns, just as Donnie Darko does, that his very existence is what causes the string of tragedies to befall the people of his town. Donnie Darko realizes that he needed to be crushed by that jet engine. He knows that by sacrificing himself, his world can continue to exist. By sacrificing himself those that he cared about could live on. So call him a Jesus figure, call him a super hero, whatever. The most important fact about the "Donnie Darko" film is that it rocked, and it made you think.