zack mennell made a costume out of nappies and waded into filthy waterways saying: ‘I’m going to be the parasite.’ The performance artist’s project became more literal than originally intended zack mennell made a costume out of nappies and waded into filthy waterways saying: ‘I’m going to be the parasite.’ The performance artist’s project became more literal than originally intended O n the Deptford foreshore, a ghoulish figure is sinking into the Thames. Performance artist zack mennell (who