I don't know! I don't know why I did it!

Related:

• I don't know why I did it, I don't know why I enjoyed it,
  and I don't know why I'll do it again. -- Bart...
• I AM NOT THE LAST DON I AM NOT THE LAST DON I AM NOT
  THE LAST DON I AM NOT THE LAST DON Bart Simpson on...
• Why do you lead me a wild-goose chase? -- Miguel de Cervantes (1547-1616) -
  Don Quixote, Part i, Book iii, Chap....
• Brodka: Hello, Mr. and Mrs. Simpson? This is detective Don Brodka from Try-N-Save security.
  That's right, Don Brodka. Your son Bart has...
• Ill-luck, you know, seldom comes alone. -- Miguel de Cervantes (1547-1616) -
  Don Quixote, Part i, Book iii, Chap....
• All I want to know is:
  WHY ME...
• Bart: I bet I can prove Krusty's innocent, but... [meekly] I need your help.
  Lisa: [genuinely not knowing] You do? Why? Bart:...
• This tagline is so old,
  I don't know why I stole it...
• I know what 's what, and have always taken care of the main chance.
  Miguel de Cervantes (1547-1616) -- Don Quixote, Part...