Butterfly Effect

I watched "Butterfly Effect" on DVD the other afternoon and was pleasantly surprised. I had been trying to catch up with it for ages but seemed to always pick something else from the shelf. I had no idea what it was about - I'd just heard that it was fairly good - and that Demi Moore's current squeeze was in it (not sure if he was; not enough up on the Hollywood scene). It was good, even though it took a while to work out what was going on (a plus) and it seemed to have a major plot inconsistency (why didn't Jason take a more proactive role - ah, I think I see it now! - oops, no I don't! Raises more questions than it answers.)