Touch the Stove
Wikisimpsons - The Simpsons Wiki
In the episode that the Simpsons watched, the contestant was a man named Kevin. The host asked Kevin about his hobby of collecting amusing postcards. As Kevin started to talk about his hobby, the host grabbed his hand, shoved it onto a hot burner on the stove and said "Touch the stove!" as Kevin screamed in pain.
Mr. Burns was in the audience for the show.