I got into bed and heard it, for the first time. My heart. It was a walk in from the car, navigating furniture and giving instructions, and Thing2 so tenderly walking at my side with his arm around my waist, carefully guiding me to the room, and we got the bags down and I laid down, bolstered up to sit and.... "Thrub-thrub, thrub-thrub...." Haven't heard it like that before.