In 1964 Bob Lens performed a piece where during a concert of another composer forty alarm clocks would be set to go off in the theater. This composition had many variations. Sometimes the clocks were set for the same time…sometimes at various times during the music. He also employed varying numbers of clocks…

“Keep walking. There’s nothing to see here,” Kosugi said.

And I looked down at all the feet moving and it was enough.

Take two sheets of paper
Make two paper airplanes
Throw them in the street

*Make certain that many people do this at the same time.