Talking about challenging behavious, at the weeknd ds was being over physical with me (climbing over me and the couch) and after a few request asking him to stop and a warning, I then told him to go into the hallway (standard punishment).
He wouldn't go - but on this occasion, instead of carrying him there myslef, I just said, "FINE", gathered up my bits and pieces, and flounced out the room, shutting the door behind me and went into the kitchen.
A minute or two later, there was contrite little voice from the hallway, "....Mummy, I'm in the hallway now. Will you come back..... mummy....?"
Of course I did!