Nightdreams is a 1981 pornographic film with strong horror elements directed by Francis Delia, and written by Jerry Stahl and Stephen Sayadian (credited respectively as "Herbert W. Day" and "Rinse Dream").

Two scientists use electric jolts to induce a woman named Mrs. Van Houten with surreal and erotic dreams.

After a set of strange scenes ranging from having sex with a man inside a Cream of Wheat box to a trip into the abyss of Hell, a surprise ending reveals who the woman receiving the jolts of electricity is.

[9] In 2007, AVN called it one of the "50 most influential adult releases of all time" for starting the alt-porn genre, which uses "MTV-inspired, rock-video schtick, hipster references and underground music.

"[10] The soundtrack includes "Ring of Fire" as covered by Wall of Voodoo as well as renditions of "Ol' Man River" and Gymnopédies.