As part of a science experiment, a man has spent a record-breaking length of time alone down a hole, but an hour before he's due to re-emerge, something goes wrong and his colleagues have to go in to rescue him.

• DirectorUmberto Lenzi
• Release14 December 1989
• GenreHorror
• Duration1h 30m
• Budget$222,000
• Revenue?
• Rate
  

  4.559
  17 reviews
• Productions

  Alpha Cinematografica