Knock-Knock, Who's-There, Mamma!

In an effort to stop Annie's usual comment of "sared me!" ("You scared me!") when I open any door (car or room), . . . I started taking a new approach. I knock a few times and then say, "Knock Knock!" and Annie replied "Who's There" and I say, "Mamma!" We do this about three times, and only THEN do I go in. Ironically, the time in the video, Annie still says, "sared me!" Ha! : )