Guerilla Art in the Ladies' Room

Inspired by Artist Keri Smith's book on Guerilla Art, I installed this little drawing in the ladies' room at work. Someone had removed a coat hook that was screwed into the top corner of the stall door, leaving 2 hole marks and an outline that looked strangely like E.T's head!

It was great fun hearing people's reactions, one person posted a photo of it on Facebook (see first pic below), another person added their own guerilla art to the scene the next day (see second pic below)! The most heard comment: "I was sitting on the toilet and I looked up and just laughed!" How often does someone say that in polite conversation?