2P PENNY PUSHER 1986: Simulating Multi-Layer Coin Shingles, Anti-Wedge Pins, and Cliff Ledge Avalanches in Canvas
"Deconstructing the mechanical physics of classic British seaside coin pushers: multi-layer Z-shingle stacking, continuous cam shelf kinematics, anti-clamping pinboard geometry, and the psychological engineering of cliff overhangs."