There's only a few more days to catch this eerie, trippy, mellow art event on the mall. Doug Aitken's "Song 1" runs through this Sunday, May 20, from sunset to midnight. It's a 360 degree video projection onto the circular walls of the Hirshhorn Museum, accompanied by various renditions of the song "I Only Have Eyes for You." There was something special about how quiet and almost reverent the crowd was, sitting on walls around the sculpture garden or walking around the museum's perimeter watching the images stream by. What a lovely way to spend a spring evening in Washington.