Stephen Worth says:
It's rare for a publisher to allow a parody of its own characters, and
unheard of for the creator himself to get the opportunity to make fun
of his own creation. But back in the late sixties, the powers that be
at Marvel didn't take themselves quite so seriously. Here we have the
unthinkable… Jack Kirby and Stan Lee doing a parody of their own
Fantastic Four and Silver Surfer comics!
"The Fabulous Fantastical Four Suffer Through The Saga Of The Silver Burper!"
Marvel's Not Brand Echh! #1 (1967)