Suprise of diesbelief is a feeling that we feel when we read or heard an amazing news which suprised and amazed us.

To express surprise or disbelief :
What a surprise! That’s a surprise!
(Well), that’s very surprising!
Really?
What?
Are you serious? You must be joking!
You’re kidding!
Fancy that!
I must say … surprises me.
I find that hard to believe.

When you got a surprising fact, you can say :
Do you know what?
Believe it or not?
You may not believe it, but …
Can you believe this?

You can respond to the surprising fact using these expressions :
Really?
Are you joking?
Oh?
Where? Show me