Animate this exact scene naturally. Vanya slowly walks forward, then suddenly stops when the glowing firefly falls into the grass. His facial expression changes from relaxed to surprised and concerned. The firefly's glow fades out. Vanya slowly looks down toward it and takes one careful step closer. Smooth cinematic camera movement, subtle wind moving his hoodie and hair, natural body movement, realistic animation, 5-6 seconds. Keep Vanya's face, hairstyle, clothing and body proportions exactly unchanged.
