you sound like me with those types of falls. I'm always doing it. I did it the night before last. Hubs had just gone to bed maybe 10 minutes before, and he's asleep the minute his head hits the pillow and a tornado won't wake him.. but I started to come up the stairs holding my Ipad in one hand and the Ipad holder in the other, and something else in the same hand , and missed my footing 3 or 4 stairs up, and just as you describe, whacked my right shin, left arm, and my bad knee... hubs opened his door, the noise of me falling woke him up, and he came to check on me ..and I hadn't cried out or anything, but the noise of me falling was so loud...