What is the one plot twist you will never understand?

No matter how hard I try, there are certain plot twists I will just never understand. Sometimes it's because they come out of left field and leave me wondering what the hell the writers were thinking. Other times, it's because the twist is just too freakin complicated for ordinary humans to grasp. What is the one plot… » 2/18/14 2:00pm 2/18/14 2:00pm