Open Door

The plot in Open Door isn't exactly groundbreaking - especially in the world of short horror films - but this one is executed really well. In short, two co-workers take the elevator from a high floor when it suddenly drops... and keeps going even past the ground floor. The acting is solid, the production looks professional, and the atmosphere genuinely sent chills down my spine. The only drawback is the cliffhanger ending. Hopefully, there will be a sequel so we can finally find out what happens next.