Patient: I was playing soccer last night and right after I kicked the ball, I landed on my right knee when it was locked. It was a bad pain at first but after about five minutes I was able to play again. It was still sore but I could jog around on it. I woke up this morning and it feels really sore. It hurts when I bend my knee and extend it and also when I put weight on a certain spot. It hurts most walking up stairs. What possible injuries could I have gotten?