True story: After my wife and I had separated, I was having one of my worst days ever. I didn't bring my lunch to work so I decided to go to a nearby grocery store to get something to eat.
Just before I entered the grocery store, some guy asked me for money. (I assumed he was homeless, because he certainly looked like it.) He said he was hungry and just wanted to buy some ramen noodles so he could have something to eat. Of course, I was thinking that was total b*llshit; I was certian he just wanted some beer. I looked in my wallet and all I had was a five dollar bill. I gave him the $5. He thanked me and said he give me $10 back the next day. I immediately thought b*llshit and told him not to worry about paying me back.
I went in the grocery store and got a few things for lunch and as I was walking to the checkout line I saw the guy buying a large package of ramen noodles and a lotto ticket. I never saw him again, but he actually bought the ramen noodles and I'm assuming his intention was to get a winning ticket so he could repay me. That blew my mind and it made my week. Sometimes the little things make a big difference.