20 Horror Movies From The 21st Century That Didn't Actually Suck

11. Bug (2006)

If the best horrors work because of their atmospheres, then William Friedkin's adaptation of Tracey Letts' own play is one of the strongest horrors of the new millennium. The film is a tightly made and deeply upsetting piece as it follows Ashley Judd as she falls into a relationship with Michael Shannon's drifter.

After having sex, he confides to her that he has escaped a military medical testing facility. He then tells her that the room is full of bugs which have begun to infest their bodies. The bugs, invisible to us, begin to infest themselves to such a point that they seal themselves into the room and even begin to pull their 'infected' teeth out. Judd and Shannon are, obviously, brilliant in their roles but it's Friedkin's creation of the paranoid atmosphere in the piece which make this a forgotten classic.

You really fear for Judd's character as Shannon convinces her of the infection all around her. What is also brilliant is that we never know what the 'reality' is in the film. Whose eyes are we actually seeing it through? Even the end shot leaves us perplexed as all that has happened is apparently reversed. Again, it is the paranoid delusions of world gone mad and, if by the end you're not scratching your skin, then you're a very strong person indeed.