A polished glass marble, streaked with swirls of electric blue, barrels through a twisting DIY marble run. The ultra-low FPV camera hugs the course, matching every motion as the marble spirals through funnels, dives down transparent tubes, and launches from ramps into curved tracks. The course winds across a sunlit living room, built from cardboard, plastic tracks, and toy obstacles. Motion is thrilling, with every twist and bounce in perfect sync.