Whip It is not about nefarious S&M practices, nor the art of patisserie, nor even dog racing - although it has trace elements of all of the above. Instead, Drew Barrymore's sweet and swaggering maiden trip as director is a confection set in the rough-and-tumble world of female roller derbies, at which rival teams hurtle around a curved rink like bats out of hell, inflicting grievous bodily harm on each other in the process. For those unversed in the finer points of the sport, the film helpfully explains these near the beginning. Basically, though, it involves "hot girls in fishnets beating the crap out of each other," a spectacle which, whatever your gender and sexual orientation, you may well find curiously appealing.