Back in the '80s, there were those lamentable Psycho sequels in which Anthony Perkins milked Norman Bates' dementia. Then, in 1998, came Gus van Sant's why-bother remake, which essentially ran the original through a color copier. But between the inferior spin-offs, Scottish artist Douglas Gordon masterfully transfigured Alfred Hitchcock's notorious classic into a heady, all-day endeavor with 24 Hour Psycho. In his conceptual screed, Gordon elongates — and, on one side of the split-screened presentation, reverses — Hitch's scenes to probe the time-tied relationship between memory and the image. Seen again at about 1/13 its recollected speed, Janet Leigh's iconic shower regains its white-knuckle shock factor.