Dr Sean and Gorillionaire are on a backyard campout! Their mushroom night-light glows cozy and warm. Suddenly—CLICK-POP! The night-light goes out. The tent is pitch black. Then comes a sound from outside. CRUNCH-CRUNCH-SQUEAK! Sean's tummy goes tight. His legs go wobbly. That is the Worry Bug! That is a little bit scared! Sean squeezes his brown teddy bear. "Time to be brave," whispers Sean.