NOTICE: When I made this and uploaded it, I had NO IDEA that Triviatrap1982 had already made the same video! Sorry!
So, I've been researching the history of the Emergency Alert System, and ran across this. Sometime back in the 70s, TM Productions made a jingle out of the Emergency Broadcast System test script, and I think they may have actually used it as a recorded test. Anyways, the FCC caught wind of this and ended up making a rule that said you could not sing the test script or read it as if it were a joke.
The EBS is serious business. :P
Picture came from Wikipedia, song came from www.conelrad.com.