New York performance artist Millie Brown drinks coloured milk and vomits it onto canvases. She films the process for those who care to watch and sells the resulting paintings for over 2k a pop. Leg of Lamb prefers Alex Vivian’s down-home approach, that involved ingesting foods of similar colours and regurgitating them amidst unsuspecting passers-by on the city streets of Melbourne. And then of course there’s Keith Boadwee, who specialises in ejecting paint from an entirely different orifice….(below).