1989 · 1h 30m · Horror
Genres: Horror
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.
Director: Umberto Lenzi
Writers: Olga Pehar, Umberto Lenzi
Music by: Piero Montanari
Cinematography: Sandro Mancori
Editor: Vanio Amici