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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 »


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Cast overview, first billed only:
Marion Eaton ... Mrs. Gert Hammond
George Kuchar ... Bing / Medusa
Melinda McDowell ... Sash
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 ... 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


Thundercrack! Remember that name and then try to blot out the stain such an experience is bound to produce! See more »


Adult | Comedy | Horror


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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 are conflicting remembrances as to whether she had the stomach flu or merely too much to drink, but regardless, at the 1975 Filmex premiere screening, Marion Eaton became violently ill and spent the remainder of the evening hugging the toilet bowl, just as her character did in 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 »


Gert: He's quite a man, isn't he?
Willene: Well, part of him is a man, the other part I'm not too sure about.
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 »


Spoofs Psycho (1960) See more »


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

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User Reviews

Surreal and bizarre porno masterpiece.
16 March 2006 | by HumanoidOfFleshSee all my reviews

"Thundercrack!" starts out as a horror flick with some people taking refuge in a ghostly mansion during a storm at the countryside.Their hostess is one of the weirdest female characters ever shown on screen.Dead drunk,horny,delirious:Marion Eaton plays the role with a vengeance.What is the secret with her dead husband?Where is her son? Why does she keep human body parts in the cellar?It really doesn't matter much.Very soon,everyone gets involved in something much more interesting:having sex in every which way possible and impossible.Curt McDowell's "Thundercrack!" is easily one of the most bizarre porno films I have ever seen.It's shot in a black and white and loaded with raunchy hard core homo/hetero sex.The script is supremely strange and the acting is fine.Marion Eaton is especially memorable as a creepy Mrs Gert Hammond.I can't wait to see a fully uncut 152-minutes long version of this film.9 out of 10.

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