Context: At work today, all my coworkers sang me happy birthday. It was so nice of them! 
Speaker 1: At work today, all my coworkers sang me happy birthday. It was so nice of them!
Speaker 2: That's awesome! I love when people remember my birthday.
Speaker 1: It was so thoughtful of them. I didn't even mention it was my birthday. 
Speaker 2: How fun! I wonder how they knew.
Speaker 1: I don't know. But they sure wen't above and beyond!