Weird looping movie with a room full of people oblivious to each other

"Tango" by Zbigniew Rybczyski, a 1980 avant-garde film, was the first Polish film to win an Oscar. During the 8-minute film, a room that starts out empty gradually fills with more and more people. Each person repeatedly performs an action on a loop; a boy climbs in and out of the window to fetch a ball, someone does a handstand on a table, a woman paces back and forth with a crying baby, and so on. — Read the rest