Berserk Button: When Edith is in an irritable mood and Archie (and everyone else) gets on her nerves, she goes into her uncharacteristic — but ultimately classic — tirades, ending with the famous triple "stifle."
Beware the Nice Ones: Edith finally telling Archie what she (perhaps) wanted to all these years: "Stifle, stifle, STIFLE!!!"
A Taste of Their Own Medicine: Edith's "Stifle, stifle, STIFLE!!!" to Archie when he tries to get a word of concern in.