A young married couple on winter vacation makes a terrible mistake when they     agree to give a ride to a mysterious man who calls himself "M". Their            discomfort with their passenger's peculiar behavior gives way to sheer terror    when his violent tendencies become clear and a news breaks of a series of      murders along the highway. Possibly influenced by Robert Harmon's The       Hitcher, this is a shocking and graphic example of the new wave of Korean   horror films. In Korean with English subtitles.                                  Kim Sung-Hong---South Korea---2001---104 mins.