Doonesbury by Garry Trudeau for October 02, 1980
Transcript:
Voice from television: ...And now that Ed has hypnotized the shark, he will place his five-year-old son, Marky, in the tank to show that the shark has become completely harmless! Man: Good luck to you both, Ed and Marky! Be amazing! Voice: Thanks, John. Okay, son, in you go! Boy: Daddy! Daddy! The shark is.... AAIEE! Man: Oh, my God... Voice: I'm so embarassed. Is this live?
Okay, what the heck was this referencing? Was someone actually doing stuff like this in 1980?