So many movies feature two cops, or one cop and a partner of some sort, who are totally mismatched and therefore present an opportunity for comedy dialogue. Even in a serious crime film, this gives the movie a chance to lighten the mood while chasing down the worst criminals on the planet. I bet you've seen most of these movies, but in case you don't recognize some of them, there's a list at Slackstory. NSFW language. -Thanks, Nick!