An occupant safety cage (1, FIG. 1) for a transportation vehicle (e.g., a car, truck, etc.) that is separable from but tethered to the vehicle's mainframe and/or remaining portions of the vehicle, is attached by means of stretch and deform cushion mounts (2, FIG. 2) and/or stretch and tear strap mounts (3, FIG. 3) and/or extendable tether cable mounts (4, FIG. 4) and allows the occupant safety cage (1) to separate in any and all relative directions and remains tethered at a safe distance by a controlled design intent of said mounts from the sacrificial areas of the vehicle in stages of implementation (see FIGS. 5 and 6) as resulting from the forces and/or inertia level(s) from thereof as caused by a high-speed collision at the front and/or rear and/or sides of the vehicle as shown in the drawings (see FIGS. 7A and 7B).