If you hate being the one guy at a party who doesn’t dig recreational drug use, you’re probably going to have a rough time with Crystal Fairy. Oscillating between road trip shenanigans and drug-induced catharsis, Chilean filmmaker Sebastian Silva has the makings of a good film lying right out in the open, but the film’s better elements -an absolutely fearless performance by former child actress Gabby Hoffman chief among them – never gel cohesively with the areas where Crystal Fairy ends up failing. For a story that hinges entirely on a journey of personal realization and cactus-derived hallucinogens, the film exhibits a shocking lack of profundity and doesn’t end up…