Fluxus

Fluxus was very much about humor. And whether it was George Maciunas's top hat, or the fact that Emmett Williams was standing in front of a group, and he's got a scroll, and he's reading the scroll, and the scroll gets torn up, or something happens to it.

Nancy Perloff, Nancy Perloff on E.A.T. at the Getty

I think this dematerialization started actually in the '50s with the Gutai movement in Japan, but I think it really starts in earnest and gets more globally popular around 1961 with New Tendencies and the beginning of Fluxus.

Peter Bauman, Michael Spalter on 1960s Computer Art