unconcerned nature regarding... Well, everything.
1. When she locks Homer in the pantry after he goes insane. She says, "Now don't come out until your sane", grabs a can and says "Hmm... Chili will be good tonight"
2. Lisa: Mom, is dad going to kill us? Marge: I guess we'll just have to wait and see.
3. When the kids are about to be eaten by the teachers and they approach Marge, she says "Kids, you're 8 and 10 years old now, I can't be fighting all your battles for you. You go right up to them, look them straight in the eye and say 'don't eat me'"
4. When the 50 foot eyesores are destroying the down Marge says "These monsters are destroying everyone and everything we hold dear!... And you kids should have jackets on"
5. Marge when Homer eats the soul donut: "Mmm... Homer, did you eat that donut?" with no panic at all.
6. Marge: "Did everyone wash their necks like Mr. Burns asked?"
7. Marge upon King Kong Homer eating her father: *light-heartedly* Oh Homer~
8. When Homer gets stuck in the third dimension. Marge: "Hmm... Better call Ned. He has a ladder"
9. When Bart merges DNA with a fly, she immediately treats fly-headed Bart like a member of the family.
10. No real surprise when Martin is killed by Groundskeeper Willie.
I'm sure there are more, but her lack of concern with the most terrifying situations is hilarious to me.