You emerge in the boathouse.
You like the boathouse -- it's sort of your "basement away from the basement".
You are just about to kick back and relax on the boathouse floor, when there is a knock at the boathouse door.
<<Knock. Knock.>>
That heavy knocking sounds familiar.
Your Brad senses are tingling.
You cautiously approach the boathouse door.
"Who's there?" you ask.
"It's Katie," says the voice. It does sound like Katie.
But how could she have gotten here so fast without the secret passage?