I got one.
A guy at work asked if I could look at his four string for him. He kept complaining that the G kept buzzing when he played. So I get his guitar and its practically out of the bag. I play it open, nothing, I play it exclusively, nothing. I was about to pack it up when I touched the string and it fretted slightly. The problem, I wasn't pushing the string all the way down with my pinky. I asked him how he played that string and he said with his pinky of course. He was so new he hadn't developed any strength in his little finger! I lowered the action of his string about a few mm and hand it back, no charge. He goes on like, "superb work, a whole world of difference!" I tell him it was on the house and I just slightly twisted two screws. "No no man, I ALWAYS pay me debts. Here's five bucks!"