Yikes...while it didn't happen while playing disc golf, I have torn my ACL. I did it around the end of June. I haven't been able to play since because (RHBH) my right knee is my pivot/torque knee. I will be having surgery in about 2 weeks and will be doing rehab for the next 6 months. By the end of things I will have essentially lost half of 2009 for disc golf purposes.