Canadian artist Maskull Lasserre crafted a violin-esque instrument around a Magnum revolver. When you fire the gun, the strings resonate. It's like the 1920s gangsters who carry tommy guns in violin cases, but in reverse.
Joshua Bell is one of the USA's most talented violin players. The day before this performance in a D.C. subway station, he performed the same piece of music in closed counters at a 100$/ticket show. In the subway station that day, only one woman out of hundreds of persons walking buy actually stopped to appreciate the music.