@JohnHammond
Actually, the Nonna's one is really out of place. Say, if her aim was to scare Katyusha then the moment it was achieved, she didn't have to go back into hiding anymore. That means she jumping out was not of her original intention.
And you say that the text tranlates that way, but the subject was omitted in the first sentence, and the second sentence is an imperative one, not question...