ANSWER:

It is not 2 seconds but rather about half a minute to a minute. 

This is what the prophet salla Allahu alaihi wa sallam used to do and as Muslims, we follow his sunnah without asking for a justification! 

Sheikh what is that little pause between the khutah the iman does for 2 seconds and sits down and stands backup immediately recites something what’s the point and what’s suppose to be done in those split seconds