Skinner: Oh oh. Two independent thought alarms in one day.

Skinner: Oh oh. Two independent thought alarms in one day. The
students are overstimulated. Willie! Remove all the colored
chalk from the classrooms.
Willie: I warned ya! Didn't I warn ya?! That colored chalk was forged
by Lucifer himself!
-- "Lisa the Vegetarian"

Related:

• Willie hears ya. Willie don't care. -- Groundskeeper Willie,
  "Grade School...
• I will not squeak
  chalk...
• All day prospectin',
  and all I found wuz this funny-colored boulder...
• Shary: Hello, Willie. Lisa: You know her? Willie:
  Aye. Shary Bobbins and I were engaged to be wed back...
• BG: Lisa, I sure am glad you dropped by. You're the first visitor I've had.
  Lisa: What about your family? BG: I don't really...
• I WILL NOT WASTE CHALK I WILL NOT WASTE CHALK I WILL
  NOT WASTE CHALK I WILL NOT WASTE CHALK Bart Simpson...
• I WILL NOT SQUEAK CHALK I WILL NOT SQUEAK CHALK I WILL
  NOT SQUEAK CHALK I WILL NOT SQUEAK CHALK Bart Simpson...
• Hank: The key to motivation is trust. Let me show you what I mean.
  I want you to close your eyes and fall backwards...
• I don't beLIEve slick
  wilLIE...