Bron Fionnachd-Fein has brought to the Thinker's attention a video'd performance, Exit Strategy, by Kanarinka (Catherine d'Ignazio, of the 'Fluxus-inspired', Boston-based group iKatun. She suggests very plausibly that it appears to be a performance of George Brecht's 1961 score, Word Event . Exit .
You can view the performance at: http://www.ikatun.org/kanarinka/exit-strategy/
Links between this and some of the sources mentioned in the previous post should be immediately apparent -- particularly when you see the location of the performance.