I'd think the same thing if I were in their position.

They both looked to the door, thinking the same thing.

If she were on the outside looking in, she'd have thought the same thing.

He had not for a long time thought the whole thing through.

I've been thinking the same thing for the past two days.

I think however the most important thing for me is the staff.

I was pretty sure we were both thinking the same thing.

Many in the room had to be thinking the same thing.

He had been thinking the same thing, but didn't want to say so.

I used to think the same thing about my father.