The movie is meant to be an action movie parody comedy. With that in mind, you can't really take it seriously. If you don't, you will find a movie where you will be laughing so hard because of how over-the-top the shooting scenes are, but at the same time you will enjoy them because of how well done they are. This is a great and fun movie to watch, and the trio (Clive, Monica and Paul) made it even better.
Be warned though, it IS very violent, has a bit of nudity, a sex scene and has bad language.