I do not remember watching his show. My husband does and told of one in his memory.

Soupy had a little side-kick named 'Pookie'. He and Pookie where on screen. Soupy held up a piece of paper with the letter 'F' on it and asked Pookie what letter it was. Pookie said 'K'. Soupy asked again, 'Pookie what letter is on the paper?' Again Pookie said 'K'. To which Soupy replied, 'Why do I see F, you see K?' (F U C K)

Combined with the other things the network hit the kill button over, this may be what brought the end of his show.