I'll never trust another old person... -- Bart realizes Grampa duped him,

Related:

• Bart: After the supermarket, we'll go to the video store,
  grab a Krusty Burger, and head for the arcade...
• Bart: Grampa, Mom was in such a hurry, she forgot to give you this.
  It's a list of the things Lisa and I can and can't...
• Marge: Grampa, could you do something? Grampa: I can dress myself.
  Asking Grampa to babysit the kids, "War of the...
• Grampa: [pours Lisa a cup of coffee] Sugar? Lisa: Yes,
  ten please. Bart: [shaking] Hey Grampa, top me off...
• It's no use kidding myself. I'm having an ethical crisis.
  Lisa is concerned about how she and Bart are taking...
• Marge: You are going to stay here and explain to Bart why you scarred him for life.
  Homer: No, I didn't! I ... Oh, you mean inside, don't...
• Lisa: Half a gallon of chocolate. Bart: Check. Lisa:
  Half a gallon of chocolate brownie fudge. Bart: Check...
• Bart: Lisa, I have this strong unpleasant feeling I've never had before.
  Lisa: It's called remorse, you vile burlesque of irrepresible...
• Never trust a person who says,
  "Trust Me"......