The usual flow of conversation (that I am used to) when a person says something surprising is as follows:
Person A: (says something surprising)
Person B: Wow! Really?
Person A: Yes, (elaborates)
(conversation goes on..)
However, I have been in situations when Person B reacts with "get out of here!" or even "shut up!!" instead of a simple "really?". This is apparently how some people express incredulity. It is not said angrily and I know it's not literally meant, but I am not sure how to proceed in such situations.
The conversation gets very very awkward as my initial reaction is indeed to "shut up".
What is the correct response to these (less polite) means of expressing incredulity? How can I keep the conversation going?
I am a non-Dutch person living in the Netherlands and I encountered this situation a few times with other international expats.