Cinematic photorealistic sci-fi action horror sequence set on a surreal alien world with dark purple skies and endless floating islands covered in glowing blue crystals. An astronaut in a detailed white spacesuit with jetpack runs desperately across the rocky floating platforms, jumping between them while being chased by a massive terrifying winged creature resembling a giant moth-dragon hybrid with powerful wings and sharp features. The camera dynamically follows the high-speed chase with sweeping aerial shots, tracking the astronaut from behind and side angles. The astronaut leaps across chasms as glowing crystals pulse with bright blue light. A dramatic close-up shows the astronaut’s terrified face inside the helmet, eyes wide and mouth open in panic. The giant creature swoops aggressively, creating chaos. In the climax, the astronaut grabs onto a thick hanging vine on the edge of a crumbling floating island, looking back in fear as the monster approaches and debris flies everywhere. Moody volumetric fog, dramatic purple-blue lighting, intense motion, realistic physics, high detail textures, and epic scale. Fast-paced thrilling survival chase with strong cinematic tension.