This story supplied by Yan Zheng, who work with Jeff at KLA-Tencor for about five years:

Four years ago, my husband and I had an argument after we bought our second house. I couldn’t remember what caused the argument, but only remember the result – Jerry was very angry and found no place to unload his anger, so he punched the wall and made a hole there. That made me even angrier. I told Jeff the next day, and when I said “How can I sell my house with a hole there?” Jeff told me “That’s a piece of cake to fix.” But then he asked me if Jerry had hurt his fist – because he said he did the same thing a long time ago and he was not as lucky as Jerry. His fist hit the stud instead of drywall. A day later, Jeff brought a piece of dry board and all the tools and stopped by our house. He showed Jerry how to fix it and finished job all by himself very quickly.