Before watching The Last Sharknado: It's About Time, I knew approximately three things about the franchise: First, that the titular "sharknado" is a frightening selachimorphic weather phenomenon that lifts hammerheads and great whites out of the ocean and sends them hurtling across the sky (and space? Unclear); second, that Sharknado 2: The Second One is Syfy's most-watched made-for-TV movie ever; and third, that there are six more Sharknado movies than there ever needed to be. The Sharknado franchise has obvious viral appeal, the same appeal that finances other intentionally bad shark movies like Sharktopus, Sharktopus vs.