Feigelson, and featuring Pat Cardi, Austin Stoker, Rosie Holotik, John Niland, Joye Hash, Jeff Alexander and Mike McHenry.
The plot concerns a shy, yet exceptionally smart biology student who uses a new physically body-altering drug he has invented to wreak havoc on those at his school who have wronged him.
Despite this, he develops a friendship with his classmate Robin Jones, much to the disapproval of her boyfriend, a high school football player named Roger Davis.
Late one night after school, Vernon sneaks into the science classroom to feed the class guinea pig Mr. Mumps, whom he has also used as a test subject for a new drug he has created as part of his biology project.
However, he discovers that the drug has turned Mr. Mumps into a small, snarling beast, which has killed a cat owned by the school's creepy janitor, Mr. Griggs.
Once everyone else has left, Vernon transforms, and after chasing and terrorizing Grindstaff, ultimately kills her by cutting off her fingers and then decapitating her with a paper guillotine.
The police officers seen during the movie's climax are also played by members of the Dallas Cowboys football team, including Billy Truax, D.D.
Feigelson says he got the idea for the movie after wondering what it would be like if the Strange Case of Dr Jekyll and Mr Hyde were set in a high school.
Crown International's then-president Mark Tenser also had approximately 8 minutes of additional footage be filmed to increase the runtime and compensate for the lost duration.
The PG version of the movie (retitled "Twisted Brain") was broadcast frequently for WPIX's "Chiller Theatre" series.
[6] The movie was also released as part of Mill Creek Entertainment's 200 Film Set Drive-In Cult Classics Collection.