Se7en

The opening sequence to this film is very good as it instantly shows the story line  to the audience. It also shows the genre of the film as a psychological horror as there are clips of strange and abnormal things going on, for example, the subject is developing pictures of what looks like human experimentation, taking clips out of newspapers and shaving his fingertips to stop fingerprints from getting onto any of the things he is doing, which seems rather suspicious.