Sheik's Nair isn't Frame 7, according to Kurogane Hammer, its actually Frame 3, and sets up into most of Sheik's combos. It lasts from Frame 3-30 with an FAF of 50, autocancels on Frame 31, meaning it also ends directly at the end of Sheik's shorthop animation, causing no lag. It also only has 10 frames of landing lag without the easy autocancel. It launches at the Sakurai angle as well. Its easily the best sex kick.