Knock, knock! Who's there?It's Jennie, from next door.I heard a lil' noise.Oh, I slipped on the floor! Knock, knock! Who's there?It's Jennie, wandering by. I heard a lil' scream.It was just a bad dream! Knock, knock! Who's there?It's Jennie, coming home. I heard a lil' spat.It's just me and my cats!...