Piggy: It's just a slight exaggeration!
Kermit: THAT'S A BOLD FACE LIE, PIGGY! I WILL NOT STAND AROUND WHILE YOU DO DUMB THINGS LIKE THAT, PIGGY! YOU HAVE DONE THAT TO ME TOO MANY TIMES! I WILL NOT STAND FOR IT!
(Piggy stammers through all of this and finally says something coherent)
Piggy:...well, Well, what are you gonna do ?
Kermit: I'LL TELL YOU WHAT I'M GOING TO DO, PIGGY, I'M GOING TO FIRE YOU! PIGGY, YOU ARE FIRED, YOU ARE FIRED, PIGGY YOU ARE FIRED!!!! FIRED!!!
Yep...Kermit's angriest moment by far (at least in the Jim Henson era)! His meltdown in "A Very Atrocious Muppet X-Mas Disaster Movie" is another one.
Gonzo: Kermit! They're gone! My Mexican jumping beans were in this dish, and now they're GONE!!!
Kermit: Well maybe somebody ate them.
Gonzo: ATE my stars? Kermit, it wasn't you, was it?
Kermit: No, it wasn't me.
Gonzo: Well I know how to find out. All I have to do is say, "Arriba."
(Animal walks by and jumps up suddenly.)
Animal: AGGHH! (Kermit and Gonzo do a double take.)
Gonzo: Arriba?
Animal: AGGHH! (jumps up again)
Gonzo: Arriba!
Animal: AGGHH! (Gonzo suddenly realizes who the culprit is.)
Gonzo: ANIMAL!!! Come back! You ate my Mexican jumping beans! (Gonzo chases Animal, who runs onstage for the next number.) Oh I hope he doesn't eat my waltzing walnuts!
The Muppet Show Episode 306: Jean Stapleton