His wild idea to quit his job and travel the world surprised everyone.
Her insane idea to start a business with no experience paid off in the end.
Their ridiculous idea to build a house out of recycled materials turned out to be a huge success.
The outlandish idea of hosting a dinner party on top of a mountain seemed impossible but they pulled it off.
Many dismissed his far-fetched idea of colonizing Mars, but he remained determined to make it a reality.