Here in S. Korea, and going in the U.S.Army Camp, and saw a man and woman in an empty field...no machines....but, bending over and looking and searching in the grass. I figured it out pretty quick. So, stopped the car, got out, and walked over. The woman had lost both her wedding ring and engagement ring.....so they were trying to "find" it, in some nice green grass. Told them I had a detector and would go get it, which I did. They showed me where the dogs had jumped on the lady, and somehow, in the fracas, she lost the rings. Well, in less then 10 minutes I had found both bands. They were all smiles.....and those rings were EX-PEN-SIVE. They were most appreciative. And we became friends. Of course, they offered to pay, and I told them, "no." But, their friendship was a great reward. And I got to help out some of my real American heros.
Sorry about the (lack or) appreciation you received. Seems some people just have not been taught what is required of them to be in the human race.