The Ultimate Comedian's Revenge
Heckling the heckler. The revenge for said comedian is going to the heckler's workplace and bothering THEM while they work.
George: "You should go down to where she works and heckle her."
Jerry: "Isn't that the Ultimate Comedian's Revenge? Heckling the heckler."
Jerry: "Isn't that the Ultimate Comedian's Revenge? Heckling the heckler."