Watch VoirFilms. Presented in a “5-D” cinematic environment utilizing a contemporary form of Pepper’s ghost—a 19th-century phantasmagoric device—and a range of sensory effects (scents, vibrations, etc.), Imponderable is an immersive feature-length film inspired by Oursler’s own archive of ephemera relating to stage magic, spirit photography, pseudoscience, telekinesis, and other manifestations of the paranormal.