The parallel universe thing kind was kind of the deus ex machina of the time travel loop/paradox and it became VERY evident by the ending. I didn't really understand who the third [dead] Jim was... I'm assuming there wasn't just 2 Jim's but many but I can't wrap my head around how. It wasn't the greatest time travel movie but not the worst either. Like Primer, there were some confusing elements. I didn't think much of the main actor until about half-way into it.