I'm out in the yard tending to some steaks on gas barbecue and my nosey neighbor (that nobody likes much) says, "Hey neighbor, barbecuing today are you?" I want to say, "Nah. I'm going into the blacksmith trade and this here is my firebox." Ah-duuhhh!
I worked in the lumber department at Home Depot (a chain of huge D.I.Y. warehouses). While stacking some boards, surrounded by nothing but wood in all directions, a customer comes up and says, "'Scuse me, is this lumber?" I was barely able to keep myself from saying, "Nah. This is a toothpick factory, and all this wood here you see is just waitin' to be cut up into little tiny pieces."
All Home Depot employees are required to wear a bright orange apron while on the clock. So, I'm on the sales floor at the Home Depot putting way some merchandise on the shelves, and a customer walks up and says, "Hey, do you work here?" I managed to resist the temptation to repond with, "Nah. I'm just wearing this orange apron as a fashion statement."