This is just a prime example where sometimes all you need to make a great thriller, is a basic premise. You can describe this movie in one sentence: A dog becomes infected with a disease and suddenly becomes violent and terrorizes people. Sure, it doesn't sound great, but boy the film really does deliver. Big time. This is just one of those movies that had me gripping my seat throughout the last half hour when the mom is trapped in her car with her son. This movie blew me away, since I wasn't expecting it to be great. Overall, I'd give it a 9/10, A overall. This is a great thriller.