If you are a fan of bad camera work and direction plus annoying teens that can't act then this maybe for you. A good idea for a movie spoilt by childish themes, amateurish acting, poor direction but most annoying of all is the cheap hand-held camera work throughout. I only managed to watch 3/4 of this drivel.

Hated all the jiggly camera rubbish. Liked the basic storyline and reasonably clever ripple effects. If you just want a teen entertainment time travel film, The Butterfly Effect does it better. If you want a really great time travel film, then you need to watch the Spanish film Time Crimes, or better still the low budget masterpiece Primer.

I really liked the cast and storyline but just cannot get past the erratic camera work..ditto with all those others of similar style (Cloverfield, Chronicle etc.)... sometimes i found myself looking for a character who seemed to have left the screen suddenly....why why why do this

This is a movie so stupid that I felt personally offended while watching it. The depth of stupidity in pretty much every line of dialogue and every scene in the movie is remarkable. I don't understand how anyone can make a movie like this by accident, I refuse to believe it, so I think it was made this badly on purpose, it's basically a trolling movie. Why do I think that? Well, if one is so incredibly incompetent and untalented to only be able to come up with a movie this bad, it's reasonable to assume they would not be in a position to make a movie in the first place. However, somehow, these people got the opportunity. I know many movies are made with zero care about the substance and their sole purpose is to make money. I understand that. But those are usually lighthearted comedies or mindless highschool dramas. When a movie is SO DAMN up it's own a** and tries to present itself as a movie about a highly intellectual topic, but at the same time is incredibly stupid on every single level, then I don't understand it. This is a movie that made me feel like the people who filmed it were trolling me, like they were laughing and pointing fingers at me because I was naive enough to keep watching the crap they came up with. They make these teenagers talk and behave in such a way that it makes them seem so deeply dumb that I would be impressed if any of them could replace a lightbulb, yet they solve one of the most complex problems in existence, while not even paying that much attention to it. Everything that happens in between is just horribly badly thought out and shows that the filmmakers imagined the viewers would have IQ's around 60 and absolutely no understanding or knowledge of anything around them. That's the only way you can watch this garbage and not feel offended or not understand what's so wrong with it. I'm afraid to imagine how dumb one has to be to actually enjoy watching this, but ok...It's an insult to intelligence, insult to common sense, insult to science and to the movie industry.