Thundercrack! is a 1975 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. It stars Marion Eaton, Ken Scudder, Melinda McDowell and George Kuchar. Combining an "old dark house" mystery with hardcore sex scenes, Thundercrack! is more recently regarded as a cult film. It bears the influences of Jack Smith’s lush, DIY, camp aesthetic, and Nan Goldin’s glimpses of countercultural bohemia.