Need help remembering this Simpsons quote.

Hello, dean. You are a stupidhead!

Homer Simpson, is that you?

“Uh-oh what did that mean? Better say something or they’ll think you’re stupid.”
Homer: “Takes one to know one!”
Homer’s Brain: “Swish!”

Funny I get that same “quote some more” urge when someone does a quote from Star Wars.

[sub]I know… I’ll shut up.[/sub]

“I feet a great disturbance in the force. Like millions of voices cried out in terror, then were silenced.”

[sup]I know, but somebody had to do it! I’ll stop now.[/sup]

outside a cinema, walking past the people waiting to go in

“What an Ending! Darth Vader is Lukes Father!”

“thanks alot, jerk”

Homer is making a little extra money as a guy who tests new drugs. Somehow they find out he has a crayon rammed in his brain, which is the cause of his stupidity-

Researcher: Mr. Simpson, we’ve taken some X-rays, and it appears you have a crayon lodged in your brain!

Homer: (Gasp!) I have a crayon in my brain?! (points to chest)

Researcher: Yes! (points Homers finger at his head)
Researcher: Homer, you can undergo a procedure to remove the crayon! It could increase your brain power by 50%!..or it could kill you.

Homer: Increase my killing power, eh!