Maggie's Farm

From wikipedia:

In 1955, Lee collapsed on camera due to an infection. His normal antics were so energetic that apparently the cameraman and the show's director assumed the fall an ad lib part of his performance. The "Peanut Gallery", an audience usually composed almost entirely of pre-adolescent children who were coached by a staff member, continued their enthusiastic cheering and applause from the on-stage bleachers. After as much as ten seconds of writhing by the stricken Lee, the camera abruptly panned to the still-cheering audience. The following afternoons Pinky Lee was not present. This effectively ended his leading role on the show, which continued without him until 1956. Rumors that he had died of a heart attack, prompted by the incident, persisted for decades. Occasionally, newspaper items mentioned the "late" Lee—even though he was performing at a dinner theater in the same city as one of the reporting newspapers. The incident also spawned rumors that Lee had been institutionalized after going insane on live television.

In 1957, Lee hosted The Gumby Show, the original appearance of that claymation character. In 1964, Lee attempted a return to kids' TV, hosting a local children's comedy program on KABC-TV in Los Angeles. This series was nationally syndicated for the 1964–65 TV seasons, but the program fell prey to creative interference from the show's producers and station management. Lee fought the interference, but his efforts were for naught. The Pinky Lee Kids TV Show went off the air after one season. One episode was released on DVD/VHS by Shokus Video, and a DVD with two episodes was released by Alpha Video.

From IMdB:

One of the hardest-working men in TV, Pinky collapsed live on the air in 1955 in what appeared to be a heart attack, but was later discovered as a severe sinus attack. When he regained his health and attempted to return, the TV networks were not receptive and his career went downhill fast. They were afraid he might once again collapse in front of thousands of children on THEIR station.

re Plunk Your Magic Twanger, Froggy

I had forgotten all about this phrase.

While this show preceded me, someone introduced this phrase at work back around 1990 and we used it as a wisecrack for awhile.