Question: horror movies that are very scary?
Answer: Saw (2004) An error occurred. ... 
28 Days Later (2002) An error occurred. ... 
The Silence Of The Lambs (1991) ... 
Halloween (1978) ... 
The Thing (1982) ... 
Paranormal Activity (2007) ... 
The Blair Witch Project (1999) ... 
Funny Games (1997)