This must be one of my favourite performance artworks of all time: Jimmie Durham, Smashing (2004).
“Wearing a suit, Jimmie Durham sits behind a desk like a bureaucrat performing his duty: smashing things. In an orderly manner, a person goes in, delivers an object, Durham smashes it with a prehistoric stone tool, violently but impassively. He stamps and signs a piece of paper as receipt and gives it to the same person, who goes off-scene. The same order of events is repeated several times during 92 minutes. This video-performance was part of Durham’s teaching residency at Fondazione Antonio Ratti in Como, Italy, in 2004.” – source