Looking for methods of displaying sharp and fragile props, I turned to my time as a model maker, when I would build dioramas to display the model aircraft I built.  Shadowboxing was a natural extension of this hobby.  In building a realistic environment for the props, I am able to craft a story that tells a little of the history of the prop. For instance, the Chronicles of Riddick knife was used on a gritty, lava covered planet, it made sense to recreate a portion of the planet surface to display the very sharp knife.