Mulla was trying to sell his house, but he wasn't getting any buyers. One day, he took a hammer, knocked a single brick out of the exterior wall, and put it in his bag. "What on earth are you doing?" his wife asked. Mulla rolled his eyes. "You don't know the first thing about sales. If you want to sell something, you have to show people a sample! I'm going to take this brick around town so people can see what the house looks like."