Signal 100 (Shigunaru 100) theatrical trailer - Lisa Takeba-directed movie

Synopsis for Lisa Takeba's Signal 100 (Shigunaru 100) from Toei International Sales (Toei Company Ltd. / Tôei K.K.): "36 high school students are cast under a hypnotic spell by their evil teacher who turns commonplace behavior like arriving late to class, using cell phones, and shedding tears into fatal suicide triggers. With 100 'signals' in all, the students watch in horror as their fellow classmates unwittingly begin committing suicide right before their very eyes. The only clues to breaking the spell is learning what NOT to do. As the carnage mounts, panic and survival instincts take over in a blood-curdling 'death game'. Can the rapidly-dwindling student body keep their sanity together long enough to find a way to break the hypnotic spell, or will mad panic and futility turn them against each other to be the last one standing?"