This was a highly risky thing to do, of course.

On top of that, it was a risky thing to do.

Maybe not; it would certainly be a risky thing to try.

But I have done a risky thing here for a storyteller.

"That was a hell of a risky thing to do."

He said it would be a risky thing to do.

I agree, it's an incredibly risky thing for him to try.

You don't have to try out new, risky things in the classroom.

It is a risky thing to break the rules, even in the best of causes.

That's a risky thing to say about a 1-15 club.