At a 2011 show at L & M Arts, he present a number of drawings and painting obscured or cover by tarpaulins or plastic sheets - in one case being covered by a wooden armoire. He has made drawings of Kool-Aid powder before covering them with a curtain; the curtain only being lifted under certain conditions. These pieces reflect the idea that in an age of surveillance and information overflow, Hammons attempts to stem this flow and withhold information. This idea was also seen more literally in his "Concerto in Black and Blue" where the Ace Gallery in New York was cast in pitch darkness and visitors had to guide themselves with little flashlights.