Thundercrack! is a 1975 American pornographic black comedy horror film written, edited, shot, and directed by Curt McDowell and written by George Kuchar based on a story by McDowell and Mark Ellinger. Combining an "old dark house" mystery with hardcore sex scenes, Thundercrack! is more recently regarded as a cult film.
The story begins during a thunderstorm. The house, which is shown in the opening shot, named Prairie Blossom, is very clearly fake which lends itself to comedic value. A caller, Willene Cassidy (Maggie Pyle), pays a visit to the house owner, Mrs. Gert Hammond (Marion Eaton), who is very drunk. She insists that she make herself presentable before she answers the door. This takes a very long time and she makes a bad job of putting on her makeup. In an effort to get the alcohol out of her system she makes herself vomit by putting her fingers down her throat. Finally, having retrieved her wig from the toilet, where it fell during her vomiting, she is ready to greet her visitor. Willene is shocked at the dishevelled appearance of Mrs. Hammond and insist on giving her a bath. Willene explains that her husband is a very famous yet untalented country music star, Simon Cassidy, whose music is heard on the radio during the later scene. During the course of the bath, Willene unintentionally masturbates Mrs. Hammond. It is also revealed that Mr. Hammond died and that their son "no longer exists".
Well her brains they rattle
and her bones they shake,
She's an angel from the inner lake
Thundercrack
Baby's back
This time she'll tell me how she really feels
Bring me down to her lightning shack
You can watch my partner reelin'
She moves up, she moves back
Out on the floor there just is no one cleaner
She does this thing she calls the "Jump Back Jack"
She's got the heart of a ballerina
She's straight from the Bronx
Hung off the line
She slips, she slides, she shops, she bops, she bumps, she grinds
Even them dance hall hacks
From the west side of the tracks
Move in close to catch her timing
She moves up, she moves back
Out on the floor there just is no one cleaner
She does this thing she calls the "Jump Back Jack"
She's got the heart of a ballerina
She ain't no little girl, she aint got no curls
Her hair ain't brown and her eyes ain't either
Round and round and round and round
My heart's wood, she's a carpenter
She's an angel in the night, what she does is alright
Dance with me partner
Dance with me partner
Dance with me partner
Thundercrack, baby's back
This time she'll tell me how she really feels
Bring me down to her lightning shack
You can watch my partner reelin'
She moves up, she moves back
Out on the floor there just is no one cleaner
She does this thing she calls the "Jump Back Jack"
She's got the heart of a ballerina
She ain't no little girl, she ain't got no curls
Her hair ain't brown and her eyes ain't either
Round and round and round and round
My heart's wood, she's a carpenter
She's an angel in the night, what she does is alright
Dance with me partner
Dance with me partner