Is there really such a thing as Disapparating?

[davenclaw]

No: HPFGUIDX 132868

I'm beginning to wonder about the nature of Apparating.  
Specifically, do people instantly appear in the new location after 
disappearing from the previous location, or is there some sort of 
state of limbo in between?  Because it seems to me that unless there 
is a state of limbo, there is really no distinction between 
apparating and disapparating - they are essentially the exact same 
thing, but from different perspectives (whether you are referring to 
where they are leaving or where they are arriving).  Much the same 
way that driving from home to work is both coming (from home) and 
going (to work) at the same time.

  But the way that JKR refers to them, it is as if they are really 
two separate events, as though you first concentrate on 
disapparating from where you are, and then once you've disapparated, 
you have to focus on where you want to go, and then you apparate.  
What happens if you get struck by something at the split second that 
you are disapparating?  Can you be unconscious while "in limbo" and 
lost?  Or is this simply a matter of imprecise speech, and there is 
only one act?

- davenclaw