First: he's weird enough to have undressed me without thinking, according to some mad notion of the 'proper' thing to do.

And it's Rick Santorum's mad notion that states have the right to ban contraception.

In this Region of Madness, maybe the maddest notions were appropriate.

He had some mad romantic notion of rowing down far enough to see Donna's light.

Then it was that there came into my head the first of the mad notions that contributed so much to save our lives.

Mwynwen, my love, how did you ever get such a mad notion?

As she stared up at the whirlwind, she had the mad notion that it was staring down at her.

Well warmed-up to his mad notions, he looks about him, then points to Hawk.

"He has this, this mad notion that I'm going to become his lady love."

Evidently this little person had some mad notion that she had the upper hand.