on the surge map, equip yourself with an airburst attachment. then go on top of tallest building (the 1 that overlooks the ocean). while you're up there, stand with your back facing the ocean all the way at the edge. then shoot your airbust at the wall you are facing straight ahead in the middle. then you will be shot all the way down the huge drop and only loose half of your health. make sure nobody is up on the building with you or you all will die and the glitch won't work.