Mrs. Peltzer (Frances Lee McCain) is introduced proving just how tough she is by only shedding a couple tears while watching It's A Wonderful Life AND cutting onions. Then her kitchen is invaded by the predators, who easily murder most of the town (it only takes one of them to kill Mr. Hanson, Billy's former science teacher). At this point, this middle-aged housewife unleashes absolute hell.
The fight starts when she sees a gremlin munching on Christmas cookie ingredients inside a blender. Who are these creatures? Where have they come from? She does not care. She punches the "on" button, and the gremlin's head is turned into green salsa. Mrs. Peltzer has no context for anything that is happening, and she doesn't need it. These things are in her home, and for that, they deserve to die. That is her one rule.
As green blood from the first monster is still spraying on the kitchen cabinets from its obliterated stump, she picks up a folding TV tray and uses it like a Spartan warrior from 300, blocking the porcelain plates being thrown at her by another soon-to-be-dead gremlin. She yells "Get out of my kitchen!" while enthusiastically murdering the plate-flinging creature with three Michael Myers-esque stabs of a large kitchen knife.
Before she is able to take a breath, she's ambushed by another gremlin, whom she quickly vanquishes with an improvised spray of flea and tick killer to the eyes before shoving it in a microwave. She turns it on, watching the creature die a slow, horrific death. She stares intently, soaking in every moment of its suffering. This is what she's been waiting for her whole life.