I don't know if astral projection is actually possible - I like to keep an open mind about such things - but I love the idea of it, and it's perfect for the horror genre, as evidenced in entertaining films such as Psychic Killer (1975) and Out of the Body (1989).
Canadian horror Eternal Evil (AKA The Blue Man) also explores the supernatural world of soul wandering, but the result is far less enjoyable than the aforementioned movies thanks to muddled storytelling from director George Mihalka (the man who gave us the excellent slasher classic My Bloody Valentine) and the fact that his protagonist isn't a very likeable character from the start.
Paul Sharpe (Winston Rekert) is an ex-film-maker turned director of commercials who learns the art of astral projection from the enigmatic Janus (Karen Black, in one of her stock-in-trade eccentric roles). When those around Paul start to turn up dead, their internal organs having haemorrhaged, a curious cop (John Novak) starts to investigate...
Despite a very promising premise, this film doesn't do anything very interesting with it (obvious budgetary limitations means no special effects and no gore) - stuff happens, but nothing to prevent the viewer from slowly drifting off. Hey, maybe I'll watch this film again to help me reach the meditative hypnagogic state necessary for my soul to leave my body and travel to the astral plane - gotta be worth a try.
3.5/10, rounded up to 4 for IMDb.