I feel terrible. I was playing with my daughter at a park near my wife's work, waiting for her to finish her shift so we could run some errands. She loved the swing, for a few minutes at least, then I took her down a couple of slides. She seemed unimpressed, perhaps even bored, so I started carrying her back to meet my wife. I slipped on some ice and instinctively caught myself on a rail, unfortunately pinning her leg against it. She was quite upset by this, obviously hurt, and I was very worried,...