The Brain loosing his mind

Arthur S02 E16a Love Notes for Muffy

The Brain: There must be some kind of justice in the world. We can't let Muffy get away with this.
Francine: But what can we do?
The Brain: I'm going to get revenge!
Comic Muffy: La la la la la!
Comic The Brain: Ah ha ha ha!
The Brain: Too simple
Comic Muffy: Eek!
The Brain: Too complicated.
Francine: Brain, you have to let this go or else you'll become some crazy guy living up in the school rafters dropping chandeliers on people.
The Brain: I can't talk to you. I must use all of my available brain capacity plotting revenge.

The Brain: Have you have realized how frighteningly easier it is to manipulated someone into doing whatever you want?
Arthur: Brain, you're acting kind of weird today.
The Brain: Am I? Ha ha ha ha! Ah ha ha ha ha!

Francine: We're in trouble. Muffy hired Fern to find out who wrote the note.
The Brain: So. She'll never trace it to us.
Francine: She already has.
The Brain: She has no proof. I'm too cleaver to leave clues.It's time to go to phase two: candy and/or flowers. Here! Look!
Francine: What's wrong with you?! Don't you understand we're in a big mess.
The Brain: He he he! Ha ha ha ha!

The Brain: At last, my plan is complete!
Muffy: Hello. Hello. That's funny. That's the third time that's happened this week.
The Brian: Ah ha ha ha! Ah ha ha ha ha!

Francine: Look at what a mess this stupid note caused! I wish we'd never started any of this.
The Brian: The thrill of revenge seems to be very short lived.