R | | Horror, Sci-Fi, Thriller
A Harvard scientist conducts experiments on himself with a hallucinatory drug and an isolation chamber that may be causing him to regress genetically.
The producer was upset that Warner Bros. decided to shove the film into the Christmas season rush rather than wait until the spring when he there would be less competition for that kind of film.
The tank itself was unusual in that it was vertical, and looked like an old boiler.
During the hallucination sequence in the cave, the pyrotechnic charges underneath the mushroom-shaped rock are visible as it elevates, as is the wire lifting it up.
ABC edited 7 minutes from this film for its 1983 network television premiere.
$174,650 (USA) (28 December 1980)