I have another good one.. . . .I worked for a small company and we were moving into a larger warehouse. We were in the process of putting shelves up on the walls. As with most ware house walls the nail heads in the "studded walls" had been taped and mudded but never textured so every so many inches it is very obvious that nails are in the studs. My bosses husband said he had better go home and get his "stud finder" so he could locate the studs in the walls so we would be sure and nail the shelving into the studs. I had to turn away from him to keep from laughing in his face. By the time he got back we had all the shelving hung up. After using his "stud finder" to locate the studded walls he was amazed how "lucky" we had been to find the studs. I had to leave the room.........He is an mechanical engineer for HP