Blast, gunbattle at Afghan VP candidate's office

The video briefly introduces a topic without going into specific details.

What do you think the speaker is trying to convey by saying 'I'm not talking about that'?

In what context do you think this statement could be used?

How might the listener react to the statement 'I'm not talking about that'?

What emotions or feelings could be associated with the phrase 'I'm not talking about that'?

Can you think of a situation where this phrase would be appropriate to use?