My cousin was the 2nd car in a left turn lane. The woman in front of him wouldn't pull into the intersection during the green light, and traffic was steady and heavy coming the other way. So when it would turn red, she'd be stuck there again, never having moved. This continued for 3 cycles, and lots of cars were filling up the lane behind her.
Then my cousin got out, tapped on her window, and politely explained that she could pull into the intersection during the green, then turn left as it turned yellow/red. She thanked him, and made her turn on that light. Feeling good about his efficient resolution of the problem, he went back to his truck. Which was locked, and running. So now she was no longer blocking the left turn lane, but he was. And guess who was stuck behind him for 45 minutes? gdae!