Domino

A man in a blue shirt and khaki pants sets up a large-scale domino effect in a hallway with a black brick wall and a white floor, arranging oversized white blocks on a black mat. He carefully positions the blocks in a cascading line, then pushes the first large block, causing the entire sequence to topple in a chain reaction. A close-up shows a hand using a pen to initiate the fall of smaller blocks, and the man crouches to observe the result.