Samuel L. Jackson’s Elijah Price, or Mr. Glass, as he prefers to be called, was by far the most compelling part of M. Night Shyamalan’s slow-burn comic book send-up “Unbreakable.” A brilliant, tortured manipulator and superhero enthusiast suffering from osteogenesis imperfecta (i.e. brittle bone disease), Glass is that kind of charismatic supervillain that you can’t get enough of. Nineteen years is certainly a long time to wait for more Mr.