Do you agree with this explanation?
http://www.donniedarko.org.uk/explanation/
>Frank tells Donnie to flood the school which in turn leads to Donnie walking Gretchen home and him then asking her to be his girlfriend. This event is not just coincidence; it's specifically put in place as part of the trap.
>Donnie rips the engine off using telekinesis, constructs a time portal from water and guides the engine through it.
Donnie was such a hateable character.