Isabelle Huppert stars as a cold, awkward high school teacher, mocked by her students and disliked by her colleagues, who gets a jolt of electricity from a scientific experiment and begins prowling around after dark, zapping people. The credits for this French horror comedy cite Robert Louis Stevenson as inspiration, but the more direct antecedent is Jerry Lewis’s The Nutty Professor. One can easily imagine Huppert throwing caution to the wind with coke-bottle glasses and false teeth, but writer-director Serge Bozon is too decorous for that, focusing instead on a wan subplot in which the electrified teacher bonds with the disabled Arab student (Adda Senani) who’s been tormenting her in class. With Romain Duris and José Garcia. In French with subtitles.