At the time, getting hit by a car didn't seem like a great idea.

You don't go from nothing to a great idea without doing a lot of work.

You never know who's going to have a great idea.

And then we thought what a great idea for a book.

Great idea, he decided, a chance to learn from the best.

And I have a great idea as to how he could do it.

Her mother didn't think it was such a great idea.

Some people here have great ideas but they don't get them out.

Why am I not so sure that's such a great idea?

It was done in the name of a great idea.