So let me explain what happened. I have a small bathroom that leads to the basement through a small hallway. I was walking out of the bathroom after changing some towels on the rack and my iPhone 4 dropped out of my hand. I tried to recover the iPhone with my foot but it bounced off the tip of my foot, slid across the bathroom tiled floor/hallway and down the basement stairs (face first on cement, 7 stairs). I was in such shock and almost angry until I ran downstairs to check the phone, and there's not a SINGLE mark on it. No scratches/dents or anything. I was in complete shock. My iPhone 4 was naked. I've fully inspected the phone twice and wiped it down with my Microfiber Cloth, and still not a blemish. I think I need to put my case on from now on though..