Popping right knee

While in Milwaukee on Saturday, I noticed that my right knee began to pop when I flexed it in and out. No pain mind you, but its got me thinking about what I had done to it. I had done a lot of walking around the city on Friday and maybe that was it. Saturday and Sunday was more of the same, and I played hockey on Sunday night with no problems to report. Today, it is still popping when I flex it. I have been told that this problem may disappear in a couple weeks. As long as it isn’t hurting my goaltending, I am fine with it. Lets hope it goes away.