A: Have you talked to Jim, yet? 
B: Yeah, he was on cloud nine. Guess what? He had passed the exam!

A: I have to repeat him everything three times in each and every subject.
B: it sounds like the lights are on but nobody's home.

A: Imagine how excited everyone was when she came home. They all shouted "Surprise!" 
B:Oh my Gosh! How did she react? She must have been shocked to see all of you there!
A: She was as cool as a cucumber. So it was actually shocking to us! 

A:She was just trying to explain. Why did he react that way?
B: Phh, never mind! It was a complete storm in a teacup. 

It was something unnecessary to get mad at

A:Hey kiddo! Hold your horses before saying more than what he deserves!

A: Have you talked to Jim, yet? B: Yeah, he was on cloud nine. Guess what? He had passed the exam!