An airbag apparatus uses an interior panel of an automobile. The primary simulation sites are selected based upon the influence of adjacent shapes, and then fragmentation is performed based on the primary simulation sites. A warning unit, which is mounted remotely from the proximity sensor, provides an audible and visual warning if the seat belt is uncoupled. The switch lever of the main switch causes the movable element of the auxiliary switch to move into the first orientation before the lever moves to the first position, but during movement of the lever from the second position to the first position. The method also includes saturating the stream of polymerized normal olefins to form a stream of normal paraffins. The barrier layer, the porous fibrous layer, and the decoupling layers are laminated together.