“In April 1986 Gerard Jan van Bladeren attacked the Barnett Newman painting Who’s Afraid of Red, Yellow, and Blue III, located at the Stedelijk Museum in Amsterdam. Van Bladeren slashed the painting several times from side to side with a Stanley knife. During his trial, van Bladerer read aloud a long essay on art criticism and explained that he slashed the painting because he was a proponent of magical realism.”

A Guide to Art Vandalism Tools: Their History and Their Use