The New York Times has an interesting article about the arrival on DVD of the first episodes of Sesame Street and the shock and horror that a parental advisory will appear saying that these episodes are not really for kids.
The first season of Sesame Street came out in 1969 and I really didn't start watching until the early 80's. Yet, I remember being terrified by some of the skits on there at the time. For example, there is this skit, titled by fans as "The Yip Yips Meet the Telephone."
This is my warning to you, this video is the Sesame Street version of the video in the movie The Ring.
Where was my warning Jim Henson? Where?
The Blakes -- Streets
From The Blakes album.
The Kinks -- Deadend Street
From The Kink Kronikles double album.