18 user 37 critic

Thundercrack! (1975)

With a killer gorilla on the loose, a group of strangers find themselves stranded at a remote mansion of a grieving madwoman one dark and stormy night. They indulge in swapping bizarre personal backstories - and bodily fluids.


Curt McDowell


Mark Ellinger (story), George Kuchar (screenplay) | 1 more credit »


Learn more

More Like This 

Water Power (1977)
Adult | Thriller
    1 2 3 4 5 6 7 8 9 10 6.2/10 X  

A lonely and obsessive individual who lives in a sordid New York neighborhood transforms into a serial rapist and torturer after watching three people perform an enema in a brothel.

Director: Shaun Costello
Stars: Jamie Gillis, John Buco, C.J. Laing
Forced Entry (1973)
Adult | Horror
    1 2 3 4 5 6 7 8 9 10 5.1/10 X  

A shell-shocked Vietnam veteran stalks, rapes and murders the rich and beautiful women who frequent his gas station in retaliation for his service in the war.

Director: Shaun Costello
Stars: Harry Reems, Laura Cannon, Jutta David
Adult | Drama
    1 2 3 4 5 6 7 8 9 10 6.4/10 X  

Hookers get revenge on a creep who terrorizes them.

Director: Alex de Renzy
Stars: Samantha Morgan, Lesllie Bovee, Melba Bruce
The Starlets (1977)
    1 2 3 4 5 6 7 8 9 10 5.2/10 X  

An inside look at the most exclusive sex club in Hollywood, and the beautiful actresses who will do anything to screw their way to the top.

Directors: Daniel L. Symmes, Joseph Tebber
Stars: Laurien Dominique, Monique Cardin, Desiree West
Adult | Horror
    1 2 3 4 5 6 7 8 9 10 3.3/10 X  

A group of castaways wash ashore on a deserted island in this Italian sex/gore movie. They are unaware that a sex-crazed radioactive monster is also on the island. He attacks and rapes ... See full summary »

Director: Joe D'Amato
Stars: George Eastman, Dirce Funari, Annj Goren
Blue Movie (1971)
Adult | Drama
    1 2 3 4 5 6 7 8 9 10 5.2/10 X  

Michael is released from prison for a sexual offense, having enjoyed himself carnally with a fifteen-year-old girl some five years earlier. His parole officer, Eddie, is keen to have his ... See full summary »

Director: Wim Verstappen
Stars: Hugo Metsers, Helmert Woudenberg, Bruni Heinke
Action | Adult
    1 2 3 4 5 6 7 8 9 10 4.1/10 X  

A hooker is drugged and gang raped, runs away and finds protection with a clan of girls trained in kung fu by a martial artist. With this help, the young woman will take her revenge.

Director: Bill Milling
Stars: Bree Anthony, Tony Richards, Peonies Jong
Adult | Drama | War
    1 2 3 4 5 6 7 8 9 10 5.9/10 X  

The infamous World War II cat house, The Pink Flamingo, is the setting where Frances, the warm-hearted madam, caters to the sex starved servicemen. Includes nostalgia, via the sets and ... See full summary »

Director: Bob Chinn
Stars: Georgina Spelvin, Jesie St. James, Kitty Shayne
Sip the Wine (1976)
    1 2 3 4 5 6 7 8 9 10 -/10 X  
Director: Dan Caldwell
Stars: Marion Eaton, Erica Hart
Adult | Comedy | Drama
    1 2 3 4 5 6 7 8 9 10 6.6/10 X  

In a restaurant in New York, the menu is unusual, with some sauces prepared by waiters on the spot. In this scenery, at another table, a reporter interviews a famous prostitute.

Director: Radley Metzger
Stars: Annette Haven, C.J. Laing, Constance Money
Adult | Horror
    1 2 3 4 5 6 7 8 9 10 6.5/10 X  

A rich socialite escapes her boring lifestyle when a ghost takes her to a sexual hell where anything goes.

Director: Jonas Middleton
Stars: Catharine Burgess, Jamie Gillis, Laura Nicholson
Adult | Drama
    1 2 3 4 5 6 7 8 9 10 5.9/10 X  

Sadistic businessman with political connections has some beautiful women working for him, and treats them badly. One of the girls, in love with an ex-Vietnam soldier, impotent because of a ... See full summary »

Director: Thomas Paine
Stars: Tish Ambrose, Eric Edwards, Robert Kerman


Cast overview, first billed only:
Marion Eaton ... Mrs. Gert Hammond
George Kuchar ... Bing / Medusa
Melinda McDowell ... Sash
Phillip Heffernan Phillip Heffernan ... Chandler Wilson (as Mookie Blodgett)
Moira Benson Moira Benson ... Roo
Rick Johnson Rick Johnson ... Toydy McNeil
Maggie Pyle Maggie Pyle ... Willene Cassidy
Ken Scudder Ken Scudder ... Bond
Curt McDowell Curt McDowell ... Medusa / Gerald Hammond (as Pamela Primate)
Bernie Boyle Bernie Boyle ... Señor Tostada
Mark Ellinger Mark Ellinger ... Charlie Hammond
Virginia Giritlian Virginia Giritlian ... Sarah Lou Phillips
Michelle Gross Michelle Gross ... Hula Hoop Girl (as Michele Gross)
Laurie Hendricks Laurie Hendricks ... Simon Cassidy's Mother
Billy Paradise Billy Paradise ... Mrs. Harlan


Take a clichéd Horror-story beginning, a remote Gothic mansion, an insane hostess, a group of strangers (four men, three women and a gorilla) and you pretty much begin to see that this is not meant to be a serious film, but rather a parody of several other (older and better) ones. Social and sexual confusion & misunderstanding guarantees that this odd cast of characters will come together and entertain & amuse. Written by Len Massaar

Plot Summary | Plot Synopsis


If you ache beneath your intestines, or scream silently in the cavities of your chest, then this picture is for you! See more »


Adult | Comedy | Horror


See all certifications »






Release Date:

29 December 1975 (USA) See more »

Also Known As:

Раскаты грома! See more »

Filming Locations:

San Francisco, California, USA

Company Credits

Show more on IMDbPro »

Technical Specs


(original) | (theatrical)

Sound Mix:

See full technical specs »

Did You Know?


There were rumors of an impending police raid when the film screened at the 1976 Mill Valley Film Festival. A few officers did show up and one later accosted star Marion Eaton to tell her that he really enjoyed the movie. See more »


Early in the dialogue, it's established that Bond has a dodo bird tattooed on his thigh. He's later seen nude in extensive detail and sports no tattoos. See more »


Roo: Howdy, stranger. No need to ask if you need a lift. We all need one in this kind of weather. The real question - the $64,000 question - is how high do you wanna get?
See more »

Alternate Versions

The original version included the 1947 color cartoon/commercial "Chiquita Banana Tells a Fortune," but this was removed from all subsequent edits of the film. See more »


Referenced in Midnight Movies: From the Margin to the Mainstream (2005) See more »


Bridal Chorus
Composed by Richard Wagner
Performed by Mark Ellinger
See more »

Frequently Asked Questions

This FAQ is empty. Add the first question.

User Reviews

A cult classic for the seriously open minded
17 March 2004 | by Chris_DockerSee all my reviews

Imagine Rocky Horror in black and white and as serious perved-out schlock-horror. Now, let's soup up the story a little . . .

We have a big old mansion on the hill. Some strangers are caught in a thunderstorm as their truck breaks down and decide to shelter. They are shown to a room in which they can change into some dry clothes (this room just happens to contain a wide variety of sexual 'aids'). Maintain an atmosphere of menace.

Soup it up a bit more. One of the characters is love-sick for a sex-crazed gorilla whom he had an affair with back in the days when he used to work in the circus. The owner of the mansion has the remains of her husband pickled in various bottles in the kitchen. Her son contracted a weird condition in the Far East that made his balls so heavy that they crushed things and sent him crazy (so he's behind a locked door and trying to get out).

Into what is becoming an increasingly complicated story that involves clichéd situations treated and re-created with incredible vision, add the odd 'porno' scene (why have pretend ones??). The effect of this is equally unsettling. Just as you get into the comfort zone of camp horror, some carefree full frontals make you feel distinctly on edge - all the better to freak you out for the next scary plot development. I should add that a bountiful mix of hetero and gay sex ensures it is not a film for dirty old men unless they are exceedingly liberal and the sudden shifts between genuinely erotic and scarily weird make you feel involved with the characters rather than observing them from a superior height.

I saw this film for a second time in 2005 and it was apparent that a number of very explicit scenes had been previously deleted. As the graphic sexuality runs simultaneously with double and triple puns explaining the subplots, it makes much more sense with them in and makes the film more cerebral than the average psychotronic experience. The acting by lead character Marion Eaton is also outstanding, almost Shakespearean, and contrasts with the tongue in cheek hamminess of other cast members in a way that makes your jaw drop. One of the most unusual films you'll ever see, I can't imagine anything more weird if John Waters was abducted by aliens and then regurgitated all over someone making a psychotic horror spoof with political and psychological undertones.

If you like cult films this as a jewel. Go and see it with very open-minded friends, or people you know very well! Thundercrack! is a cult classic for the seriously open minded.

17 of 18 people found this review helpful.  Was this review helpful to you? | Report this
Review this title | See all 18 user reviews »

Contribute to This Page

Recently Viewed