It was a holiday for me. Thanksgiving Day afternoon, 2008, Kacee was running like a maniac thru her fenced-in yard. She saw two dogs run thru the corner of my front lawn. She turned wrong and went flat down. She had torn the tendons in her right rear knee completely in two! She could walk on it, but limped. She had surgery to put it all together again and 8 weeks of no jumping - if you can imagine that! She's as good as new!
She's the only one I've ever had get hurt in my life though. That's a pretty good record.