That reminds me of a story from 2016 where somebody left a pair of glasses lying on the floor in a gallery and it was interpreted as an exhibit: https://www.theguardian.com/us-news/2016/may/27/pair-of-glas...

Also, the time in 2006 when an artist sent a sculpture to be displayed in a gallery, with a tiny plinth to prop it up: the gallery rejected the sculpture and displayed the plinth: https://www.theguardian.com/uk/2006/jun/15/arts.artsnews