This is from a performance by the Chicago Composers Orchestra "the CCO". This piece the player adjusted what she was playing based on the color of block that the other performers was placing on the Stack" .
Like several of the performers in my photos these 2 percussionists play with the Chicago Composers Orchestra "the CCO". While they're not at the CCO they are thinking up new renegade percussion performances. Here they are doing an amazing mashup of Pinter's "Celebration", mixed with modern percussion compositions.