There's nothing worse than sitting through a terrible movie for two hours, especially when you've paid to watch it. Save yourself (and your money) from any modern day equivalent of Jaws: The Revenge by checking out reviews from other cinema-goers first. The two most popular free movie review sites are IMDb and Rotten Tomatoes. You can get a quick glance at a movie's overall user rating, read reviews from the public, or see what critics thought. Don't worry about spoilers, reviews that include those are clearly marked.