TV Quote from The Simpsons 07x07: King-Size Homer

Mr. Burns: Homer, your bravery and quick thinking have turned a potential Chernobyl into a mere Three-Mile Island. Bravo!
Lisa: I think it's ironic that Dad saved the day, while a slimmer man would've fallen to his death.
Bart: And I think it's ironic that, for once, Dad's butt prevented the spread of toxic gas.