Hist Humor on Instagram: "This video demonstrates a physical event involving momentum and structural failure during pedestrian transport. The Subject A pedestrian is shown propelling a multi-wheeled utility cart while walking at an accelerated pace across a flat concrete walkway. The Mechanism As the cart hits an uneven surface, the forward velocity is abruptly arrested. Due to inertia, the subject’s center of mass continues forward while their base of support remains fixed, resulting in a loss

trend_ifyusa on Instagram: "The post highlights a rare GTA IV pedestrian animation where an NPC grabs a skateboard, leaps from a rooftop, and glides away seamlessly, a detail overlooked by many players even after 17 years since the 2008 release. This clip underscores GTA IV's procedural depth in Liberty City, where environmental interactions like this emerge from Rockstar's Euphoria physics engine, fostering ongoing discoveries in a game that sold over 25 million copies. Posted February 4, 2026,

L-CAS 3DOF Pedestrian Trajectory Dataset