I would guess that at one point or another you have had some type of pain in your body. This is a pretty safe assumption. I would bet that you have also had some kind of problem that was brought on by something very minor. Let me give you an example. You wake up in the morning and walk into the bathroom and as you go to squeeze the toothpaste out of the tube you drop the lid on the floor. So you bend down to pick it up and zap, lightning sharp pain shoots up your spine and back down again. You try to stand up straight but for some reason it feels like someone is pressing against your back causing you to hunch over and making it impossible to straighten up.