Add VG mini first-frame inputs: WindPushOppDir_SpringStretch_BalloonFloat__bg250__fck2Qe_trajectory

.gitattributes

@@ -29081,3 +29081,4 @@ Leaderboard/Video[[:space:]]Generation/TriplePhysics/WindPushOppDir_WindDeflectM
 Leaderboard/Video[[:space:]]Generation/TriplePhysics/WindPushOppDir_WindDeflectMotion_AccelSurfaceSpin__bg262__fyWN7c_trajectory/CineCamera_Moving/rgb/0000.jpg filter=lfs diff=lfs merge=lfs -text
 Leaderboard/Video[[:space:]]Generation/TriplePhysics/WindPushOppDir_VerticalFall_BlockWallCollapse__bg292__tLtVIY_trajectory/CineCamera_11/rgb/0000.jpg filter=lfs diff=lfs merge=lfs -text
 Leaderboard/Video[[:space:]]Generation/TriplePhysics/WindPushOppDir_VerticalFall_BlockWallCollapse__bg292__tLtVIY_trajectory/CineCamera_Moving/rgb/0000.jpg filter=lfs diff=lfs merge=lfs -text
+Leaderboard/Video[[:space:]]Generation/TriplePhysics/WindPushOppDir_SpringStretch_BalloonFloat__bg250__fck2Qe_trajectory/CineCamera_7/rgb/0000.jpg filter=lfs diff=lfs merge=lfs -text

Leaderboard/Video Generation/TriplePhysics/WindPushOppDir_SpringStretch_BalloonFloat__bg250__fck2Qe_trajectory/caption.txt

@@ -0,0 +1 @@
+A helical spring oscillates continuously between extension and compression within the room. It propels a gray plastic sphere toward a rotatable fan featuring a salmon-colored head and a red reflective base. Upon entering the airflow field, air pressure compels the sphere to decelerate and reverse its trajectory. Concurrently, a second gray plastic sphere undergoes free-fall motion, impacting the free end of the spring. Furthermore, a reflective balloon ascends vertically driven by buoyancy. Elastic potential energy stored within the spring drives the initial motion, whereas the airflow field exerts an opposing force on the moving sphere. As the objects move, the system exhibits dynamic interactions.