Once on a summer day, I went for a walk with my dog on the beach. The day was very hot. I thought about how I could get myself cooled off. 

 At first, I wanted to buy a bottle of cold water. But I didn't take any money on me. Then I decided to take a swim in the river. I left all my things on the beach with my dog.

After a little swim, I found out that my things had disappeared! I got ashore. Well, I was lucky enough to notice a policeman nearby. I told him everything and after half an hour my things were found in 'Lost and Found' office. 

I never leave my things unattended anymore.