"A weathered skull in a dynamic three-quarter view, jaw agape, fused with a vintage motorcycle engine. Bold, clean outlines define the cracked bone and polished engine gears. Exhaust pipes curve gracefully like ram horns from the temples, while heavy tire tread wraps the crown. Stylized plumes of dense exhaust billow from the hollow eye sockets, framing the composition. High-contrast whip-shading and deep, solid shadows create intense depth against clean negative space."