Had a similar experience a few years back myself. Woman placed her pocketbook on top of her car. I tried to flag her and her husband down as they drove by me at the pump, She looked right at me and ignored me. Watched them pull outta the gas station and it fell off as they rounded the corner. The contents spilled out into the street. I ran out and managed to pick up everything, even tho I had to duck around traffic to do it. Last I saw of the car it was headed for the interstate, so seeing as there was identification in the pocketbook, I took it home and looked up the phone number(this was back when every bodies number was in the book and you could do that). They were from a town about 40 miles away. I tried for most of the day to get ahold of them and finally was successful about 6 hours later. When the lady answered she was not grateful but instead, very upset with me that I had not taken the pocketbook back to the gas station(apparently they had turned around and gone back to ask) and now they would have to drive all the way back to get it. I told her I didn't really trust the folks in the gas station and I could have just left the pocketbook in the road, or even cleaned the cash out and thrown the rest of it away, like many other folks would have done.She told me she wouldn't come to my home to get it, I would have to take it back to the gas station. I told her I'd take it to the local police station. All of this time I had gone and was continuing to go out of my way to be a nice guy and all she could do is chastise me. She never once thanked me and ever since I question why?
As for loosing a $2000 gun because of a brain fart, while $2000 is a considerable amount of monies, I too have done many things dumber and have cost me more in the long run. Like a first marriage.