My friend was coming over and I thought I heard the door. However, on looking, there seemed to be no-one at the door but Red was tossing himself over some boxes to get into one of his hidey-holes. When I realised the noise had only been him I said "Was that you, you doughnut...?" before going off and leaving him to it.
Anyway a few seconds later the door was knocked by my friend who greeted me with "Who's a doughnut?" as she came in. Yes, it had been her who knocked on the door, and yes it was Red doing his Greta Garbo 'I vant to be aloooone' impression.