Severance was a great Dark Comedy. Like The Office mets a slasher flick. It had a very limited threater release I juts lucked out because I live in NYC one of the place screening it. Highy recommend.
Speaking of
The Office as a slasher film, you might check out photographer Cindy Sherman's 1997 film
Office Killer. I enjoyed that one quite a bit... though a lot of people I know didn't. Haha. What do they know, anyway?