​Waiting in the checkout line at Whole Foods I met one of my teachers. The person in front of me was checking out. They had bought hot prepared food which is sold by the pound. When the clerk weighed the food container and said what the price was, the customer said he only had $20 and would have to put some back. He walked over to the food bar, took food out and returned to checkout. The container still weighed too much for the money he had. The clerk kept waiting. He repeated this process of walking back to food bar, taking food out and returning 3 times. I finally got impatient and moved to an empty checkout and got right out. I knew exactly what happened instantly. My teacher was the customer who kept going back and forth, taking too long. He clearly showed me my hidden fault of impatience.