Nightmare is composed of two single-channel videos. I created a gun-projector that I altered a beam-projector by attaching a M16 BB gun with a 100m electrical wire. The projector becomes movable so that the performer can take it out. The performer shoots the images of bombs on smoke and moving trains at night. The reflected images are the historical bomb-drop done by U.S. army during Korean War. The images with the memory of war soon disappear as the smoke evaporates.