"He sees a rock. He stops to pick it up."

"Next to the rock, a duck is stuck."

"Zack lends a hand, and the duck is back."

"Zack and the duck kick a tin can."

"Zack checks his pack. He has a snack."

"He shares his snack with the duck."

"The sun sets. Zack and the duck rest."

"Zack and the duck, friends on the track."