Someone else screaming benefited me once at HSV. It started when an elderly woman, who was very confused (or very clever), wandered up to the first agent that appeared available. This happened to be an agent at the first class counter. The agent tried to explain to the woman that others were waiting and that she needed to go to the back of the line. However, it soon became apparent that it was going to be quicker to issue the woman her BP than to send her away. The entire episode was less than 5 minutes but the man ahead of me was fuming about it by the time he got to the counter. He berated the agent from the moment he approached the counter until he walked away with his BP. When it was finally my turn I commented on how well I thought the agent had handled the two previous pax and joked that she had more patience with unreasonable people than I ever would. She thanked me with one of my first op-ups. I'll follow a screamer any day!