Donnie Darko movie

Donnie Darko gets along badly with his family, with his teachers and with his classmates; but he does manage to find a sympathetic friend in Gretchen, who agrees to date him; and he has a compassionate psychiatrist, who discovers hypnosis is the means to unlock hidden secrets. His other companion may not be a true ally. Donnie has a friend named Frank, who is either a large purple bunny, or man in a large purple bunny costume. Either way, Donnie is the only one who can see him. When an engine falls off a plane and destroys his room, Donnie is not there. Both the event, and Donnies escape, seem to have been caused by supernatural events. Donnies mental illness, if such it is, may never allow him to find out for sure.