A vibrant cartoon with colours and smooth animation. Create a 30-second funny 3D cartoon video for YouTube Shorts. Story: A lazy cartoon boy wakes up late for college. He quickly gets ready, grabs his bag, and runs outside. He sees the bus leaving and starts running after it. Suddenly, a cute little dog runs beside him as if helping him catch the bus. The boy finally reaches the bus, but the doors close just before he gets there. He looks disappointed. Then the bus driver opens the door and says, "You forgot your bag!" The boy looks at his empty hands and falls dramatically. Style: colorful 3D cartoon animation, expressive characters, exaggerated facial expressions, smooth movements, funny timing, cinematic lighting, bright colors, family-friendly humor. Camera: dynamic camera movements, close-ups during reactions, wide shots during running scenes. Audio: funny upbeat background music, running sound effects, bus horn, comedic impact sound. Format: vertical 9:16, high quality, smooth animation, suitable for YouTube Shorts.