User blog comment:BrianBerta/Top 10 Most Terrifying Non-Horror Movies/@comment-5025667-20151012234020/@comment-5025667-20151013032403

While Se7en certainly is a crime and drama film primarily, a lot of the focus is on the crimes themselves, which is more than just simple murder scenes. The Sloth example you gave really highlights this - the crimes are played for horror, and they take up a lot of screen time. They're meant to disturb the viewer. Not to mention Kevin Spacey's (fantastic) role as John Doe.

Requiem for a Dream plays with that, though. Some parts are meant to be legitimately disturbing, especially the entire ending sequence. Granted, the horror aspects don't manifest until later in the film, so I'd still say it deserves a spot on this list. Definitely an emotionally-draining film.