Add Leaderboard video-generation first-frame assets (batch 184/303)

.gitattributes

@@ -19914,3 +19914,71 @@ Leaderboard/Video[[:space:]]Generation/TriplePhysics/ImpactFracture_MirrorFragme
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Leaderboard/Video Generation/TriplePhysics/MovingHitsFixed_MirrorFragmentReflect_BalloonLift__bg278__5s4e7Z_trajectory/caption.txt

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+A forward-moving yellow sphere collides with a second yellow sphere. Following impact, the two spheres maintain contact and move as a coupled system. This composite system strikes a third sphere vertically suspended by two red tethered balloons. Momentum is transmitted through the suspension structure, causing the suspended gray plastic sphere to undergo lateral displacement under buoyant tension. Concurrently, the sustained motion of the coupled pair causes one contacting sphere to approach an elliptical mirror positioned nearby.

Leaderboard/Video Generation/TriplePhysics/MovingHitsFixed_MirrorFragmentReflect_BalloonLift__bg278__AyKAVG_trajectory/caption.txt

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+A red plastic sphere moves forward and collides with a second red plastic sphere. Post-collision, the pair maintains contact, translating along the surface as a coupled unit. This assembly collides with an orange sphere vertically suspended by two grey tethered balloons. Momentum transmits through the tethers, resulting in lateral displacement of the suspended sphere while it remains constrained by the cords. Simultaneously, the coupled red spheres traverse past a nearby elliptical mirror. Momentum is conserved within the interaction chain; the balloons provide vertical support opposing gravity until lateral forces dominate.

Leaderboard/Video Generation/TriplePhysics/MovingHitsFixed_MirrorFragmentReflect_BalloonLift__bg278__BiESBi_trajectory/caption.txt

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+A porous red plastic sphere advances forward and collides with a yellow low-density plastic sphere. After the collision, the two spheres maintain contact and move along the surface as a coupled pair. This system impacts a third basketball vertically suspended by two pale purple spotted tethered balloons. Momentum transfers through the suspension, causing lateral displacement of the sphere, while buoyancy and rope constraints maintain the vertical position. Simultaneously, continuous motion drives one sphere to impact a nearby elliptical mirror. The brittle material fractures upon collision, light reflects from the fragments, and the coupled spheres continue their trajectory.

Leaderboard/Video Generation/TriplePhysics/MovingHitsFixed_MirrorFragmentReflect_BalloonLift__bg278__CHhuR6_trajectory/caption.txt

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+An orange plastic sphere impacts a second orange plastic sphere. Post-collision, the two spheres maintain contact and move as a coupled pair. This combination strikes a third blue plastic sphere, vertically suspended by two pale blue tethered balloons. The impact transfers momentum through the suspension constraint, causing the suspended sphere to undergo lateral displacement relative to the buoyancy support. Simultaneously, the motion of the coupled pair brings one sphere near a nearby elliptical mirror with a reflective surface. The mirror's brittle structure remains intact, and the plastic sphere proceeds forward.

Leaderboard/Video Generation/TriplePhysics/MovingHitsFixed_MirrorFragmentReflect_BalloonLift__bg278__POqzbI_trajectory/caption.txt

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+A blue plastic plate advances and intercepts a green plastic ball. Following impact, the bodies adhere and move as a coupled pair. This combined mass collides with a third green ball suspended by two purple reflective balloons. Momentum transfer propagates along the tether, inducing lateral displacement of the suspended sphere, while buoyancy and rope constraints maintain system equilibrium. Concurrently, the moving component remains adjacent to an elliptical mirror. The mirror remains stationary.

Leaderboard/Video Generation/TriplePhysics/MovingHitsFixed_MirrorFragmentReflect_BalloonLift__bg278__VMXVrK_trajectory/caption.txt

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+A yellow sphere moves forward and collides with a second yellow sphere, coupling to form a single mass body. This combination collides with a red plastic sphere vertically suspended by two gray tethered balloons. Momentum transfers through the suspension lines, inducing lateral displacement of the suspended sphere under tether tension. Concurrently, the coupled spheres continue moving toward a nearby elliptical mirror, resulting in trajectory deflection of the spherical bodies.

Leaderboard/Video Generation/TriplePhysics/MovingHitsFixed_MirrorFragmentReflect_BalloonLift__bg278__Y06G2s_trajectory/caption.txt

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+The yellow object advances and collides with the orange sphere. The objects coalesce into a coupled pair advancing in unison. This composite system impacts a basketball vertically suspended by two cyan braided glossy tethered balloons. Momentum transmits through the tethers, inducing lateral displacement of the suspended sphere while buoyancy maintains elevation. Continuing along the trajectory, one component impacts a nearby elliptical mirror. Brittle fracture occurs instantaneously upon impact. The interaction exhibits mass conservation and tether momentum transfer until the mirror shatters into fragments, with kinetic energy dissipating into deformation.

Leaderboard/Video Generation/TriplePhysics/MovingHitsFixed_MirrorFragmentReflect_BalloonLift__bg278__plmQJu_trajectory/caption.txt

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+A blue plastic object travels forward and collides with a blue plastic sphere. Subsequent to the impact, the two bodies remain in contact and move as a coupled pair. This composite system subsequently strikes a third sphere, vertically suspended by two tethered balloons. The collision transfers momentum through the suspension structure, inducing horizontal displacement of the suspended sphere under the influence of buoyancy. Concurrently, the continued motion of the coupled pair causes one body to strike a nearby elliptical mirror, resulting in brittle fracture of the reflective surface.

Leaderboard/Video Generation/TriplePhysics/MovingHitsFixed_MirrorFragmentReflect_BalloonLift__bg278__rEDKLt_trajectory/caption.txt

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+An orange plastic sphere with numerous hollow holes moves forward and collides with a blue plastic sphere. Following impact, the two spheres maintain contact and move as a coupled pair. This composite system strikes a third sphere, vertically suspended by two tethered balloons. The collision transfers momentum through the suspension structure, causing lateral displacement of the suspended sphere. Concurrently, the continued motion of the coupled pair results in one sphere impacting an adjacent elliptical mirror, leading to brittle fracture of the mirror.