Fractured my knee cap and tore my patella off my shin playing foot ball, Got the cap all grouped together and held in place with a wire and got the patella wired back to the bone, about 4 month in a full leg cast then re-learn to walk again then about 6 month later when having kick around's with my mates(against docs advice) managed to snap both wires. Felt a ping and a slight jagging pain at the time that never really went away but thought nothing of it, until a check up xray a few month later. Then had to get another op to remove the wires. Now my knee cap looks and feels like a rocky mountain range and i can't kneel on it unless i have lots of padding under it so now my other knee suffers from taking the brunt of the kneeling. Other than that all seems fine for now but think it will give me a lot of trouble in the future. Had to give up football as I struggled to ever get my fitness and movement back again, not that I was that good to start with haha