Imagine you are lost in the woods running from a bear. It's night time and you can't see where are you going, and it just started to run quite heavily. You whip out your iPhone as you run to turn on the flashlight...Ah! The rain falls on the screen and the flashlight button becomes unresponsive. The bear is also catching up. In a few seconds you'd be done for. If you trip or run into a tree now it's all over. At this moment you remember that you have set your action button to turn on the flashlight. You press it and the light turns on! Suddenly you see a tree just three feet from you and you were just about to hit it. You swerve at the last moment just as the bear pounces. The bear hits the tree instead and fell unconscious. You keep running. Setting the button to flashlight has saved your life.