Yikes, I feel lucky after going through this thread!
The only real 'dog induced injury' was from Aspen in 2007. It was the night Riley came home, and I was outside letting him go potty. Aspen was playing with him, and everything was just fine. Well, Aspen decided to do her 'spin'(she sits back on her haunches and throws her shoulder to the side to change directions fast). She decided to do this right next to my knee. All 63 pounds of her shoulder hit my knee cap(and I was standing with my leg straight, bad idea) and popped my knee cap right out(the petalla, not the entire knee...thankfully). I can still hear the 'pop' in my head when I think about it. Thankfully, it self-corrected and by the time my knee buckled and I fell, it popped itself back in. I have had issues with the same knee doing this prior(without Aspen's help though), so it wasn't completely her fault.