One of the most influential films of the era, on Bs and beyond, was Paramount's "Psycho". Its in earnings against a production cost of $800,000 made it the most profitable movie of 1960. Its mainstream distribution without the Production Code seal of approval helped weaken U.S. film censorship. And, as William Paul notes, this move into the horror genre by respected director Alfred Hitchcock was made, "significantly, with the lowest-budgeted film of his American career and the least glamorous stars. greatest initial impact ... was on schlock horror movies (notably those from second-tier director William Castle), each of which tried to bill itself as scarier than "Psycho"." Castle's first film in the "Psycho" vein was "Homicidal" (1961), an early step in the development of the slasher subgenre that took off in the late 1970s. "Blood Feast" (1963), a movie about human dismemberment and culinary preparation made for approximately $24,000 by experienced nudie-maker Herschell Gordon Lewis, established a new, more immediately successful subgenre, the gore or splatter film. Lewis's business partner David F. Friedman drummed up publicity by distributing vomit bags to theatergoers—the sort of gimmick Castle had mastered—and arranging for an injunction against the film in Sarasota, Florida—the sort of problem exploitation films had long run up against, except Friedman had planned it. This new breed of gross-out movie typified the emerging sense of "exploitation"—the progressive adoption of traditional exploitation and nudie elements into horror, into other classic B genres, and into the low-budget film industry as a whole. Imports of Hammer Film's increasingly explicit horror movies and Italian gialli, highly stylized pictures mixing sexploitation and ultraviolence, fueled this trend.