Memorial Day weekend is upon us, and for most that means beach, sun and water sports. For us, however, that means big summer movies are officially here. Whether accurate or not, Hollywood views box office totals from this weekend to predict how the summer will go like Punxsutawney, Penn., uses a groundhog's shadow to forecast winter's end.

This doesn't always hold up. Despite last year's Memorial Day box office haul being the lowest in 17 years, Hollywood still had one of its most profitable summers ever. The following five movies will tell you one thing about what type of movies do well over Memorial Day: huge action-adventure sequels.

Opening this weekend, 'The Hangover: Part II' and 'Kung Fu Panda 2,' have the "huge" and "sequel" parts down. But they'll be trying to break into the list as the only raunchy comedy and animated film in the top five. Can they do it? Read the breakdown and decide.