... on the tile floor in my kitchen while removing it from the Apple bumper case so that I could replace my glossy screen film with anti-glare screen film. The bumper case acts like a big rubber band when you remove the phone from it, and in my case the phone slipped from my grasp and shot out as though fired from a weak slingshot -- right onto the floor, from a height of three feet. Now there's a small, but noticeable-to-me-when-the-bumper-case-is-not-installed, gouge in the steel and the back glass at the lower-right corner of the phone. The phone still works, and the bumper case conceals the damage -- but I still know it's there. Lesson to be learned: When removing phone from case, do so on your bed, or somewhere else where there's nothing that can damage the phone.