Primitive Cavemen Discovering a Smartphone

A humorous 4-panel sequential storyboard featuring [three primitive cavemen] discovering [a modern smartphone]. Consistent character identities, distinctive facial features, and prehistoric animal fur garments across all panels. Panel 1: Intense curiosity and confusion as they examine the glowing phone lying on a stone. Panel 2: Startled panic and dramatic retreat when the phone suddenly rings and vibrates. Panel 3: Cautious suspense as one caveman hesitatingly touches the touchscreen. Panel 4: Triumphant joy, broad grins, and celebratory laughter as they pose together for a goofy selfie. Prehistoric rocky wilderness background, dramatic cinematic lighting, highly expressive comedic faces.