storyboard for 'when balls go bad' animation

so this is the start of my ideas for this assignment - my 'ball' starts out as a meteorite that falls to earth into the side of a mountain. It rolls out of its crater and snowballs down the mountain, getting bigger as it picks up the snow. Eventually it reaches a lake/sea and falls in, the snow melting off. it gets eaten by a fish, which is subsequently eaten by a larger fish and  in turn is eaten by a shark. i'm not sure how many seconds this sequence will take so i may have to end it at this point, however depending on how it goes i would like to have some way to get the ball back out of the fish and have it come to a final resting place.