Have tried to search the internet for an answer to this, but I am struggling. The history is that I was cycling along when a dog ran into my front wheel and took me off. I hit the ground on my left side and rolled to my left and struck my right knee on the ground as I came to a stop face down. I was using Look Keo 16Nm pedals. I am a very experienced cyclist. I use 20Nm one on track and for time trialling, 12Nm on my wet weather commute bike. Now I have no problems with these pedals whatsoever and have a long history of using Look since the 80s and still us them. I sustained a anterior cruciate ligament tear due to my striking the ground and I have no doubt in my mind that this striking of the ground caused the tear. The dog owners have said I simply came to a stop and being unable to release my feet from the pedals fell over and caused the injury myself. Does anyone have any idea if and test cases or tests themselves can refute the dog owners assertions or corroborate mine. Any help would be gratefully received. Many thanks, Gary Strachan.