Agnes Skinner (born January 17), more commonly known as Mrs. Skinner is the strict and bitter mother of Seymour Skinner. She is very harshly controlling of Seymour, and treats him like a mother would a small child, once grounding him because he did not say who was at the door after answering it. She hates Seymour's choice in women, especially Edna Krabappel. .
Agnes has married a total of four times, once with Skinner's father, Sheldon Skinner, and following Sheldon's death she then married three more times, each time, to a tow truck driver. In the 1920s, Agnes used to be a wing walker on early planes and performed. Her videos were shown in museums. During the 50s, Agnes was an Pole Vaulter and competed during the 1952 Summer Olympics
Here's the video: http://youtu.be/ncHFmYONyzE