The first poster copies and pastes this...
 
  
 KNOCK ~ KNOCK
   
The second poster copies and pastes this...   
   
  
 WHO'S THERE ????
   
The next person posts a tag  with their name. 
 And then it starts all over!
  
 The 50th person to post 
 will win a pressie
 from me.  No back to back posting please.