The Classic Underdog End Credits (Syndicated Version) Music

Out of all the music I have ever heard in my life, this music at the end of this video is perhaps the most pervasive in my mind, and the most disturbing. It was disturbing for me as a 4 year old kid, and it always takes me back to that point when I hear it. I don't know what it is, but the end credits of the classic Underdog cartoon has really creepy music, in my opinion. That "post no bills" sign in here is significant, too, because I had never really understood that in the cartoon until I later saw realy signs (as a late teenager) saying "Post No Bills" on construction sites.