In Central Park, ordinary New Yorkers are falling victim to an unseen enemy. Construction workers leap to their deaths from skyscrapers. "The first stage is confused speech," a headmaster tells teacher Elliot (Mark Wahlberg). "The second stage is loss of direction, the third stage - is fatal." Fleeing by train, Elliot and his family are deserted in rural Pennsylvania, where he realises that a killer toxin attacks only people in groups...
Where Hollywood's horror fiends boil blood in buckets, M. Night Shyamalan prefers a subtler way to scare audiences. The Sixth Sense director has a knack for openings - the shots of suicide jumpers has an eerie echo of footage from 9/11. When Elliot is pushed off the train in the middle of nowhere, he asks why. "Sir, we lost contact," says the train conductor. "With whom?" says Elliot. "Everyone." Quietly chilling.