Skipping River Rocks

This is a story I wrote based on a Harris Burdick image called a strange day in July.
This was a story for school so it had a bit of a criteria:
-- 600 to 1000 words
-- Use the quote in the first or last sentence
My line that i had to us was "he threw with all his might but the third stone came skipping back"
I hope you enjoy, comment and vote on it if you like!
I am also happy for any feedback to improve my story:)