I was taken by the insane notion to help tend the girls.

And just like that, it suddenly became a much less insane notion.

She had the most insane notion to toss it at his frowning face.

"When did you come up with this insane notion, anyway?"

He was too exhausted to pursue such an insane notion.

I also had some insane notion about helping people.

You should have tried to talk her out of the whole insane notion.

They have some insane notion that we have kidnapped one of their friends.

I'm actually beginning to consider the insane notion you've brought here.

She thinks he actually had insane notions of his own divinity.