Leg gets out of joint, have to straighten, pop
I was wondering if anyone else has experienced this: on rare occasions if my leg is bent, and I move it in an awkward way, it suddenly feels like it goes out of joint at the knee. I'm not sure if it's a common "awkward" movement each time that causes this because it usually happens so fast I don't have time to consider it. It actually feels like something’s badly out of joint, like 2 bones got side-by-side that aren’t supposed to be that way, or something. It’s a VERY scary feeling. You just panic. The only way to make it go away is to straighten your leg out fully, and then you can actually hear it pop.
It used to happen when I was a little boy, and now its happened twice in the last 2 years—once this morning. When I was little I remember sitting there in a panic, trying to manipulate my leg back into position, and sometimes I could do it, other times I’d have to just bite the bullet and straighten it, making it pop. When it happens now, though, my body just reacts almost on its own, and I instinctively stand up and straighten my leg and it pops. The very thought of it sends a shiver down my spine.
I should mention that I'm one of the skinniest people I've ever seen, almost 6'3" and only 150 lbs, with very long legs in proportion to my upper body length. Perhaps the leverage on the knee (from having such long legs) is too great for the amount of muscle in the legs to control. Maybe that has something to do with this...
Fortunately this happens infrequently enough that I'm not concerned with the event itself... but I'm just wondering if it implies there's some underlying problem with the bones in my leg. Anybody know? Anyone heard of or experienced this? I've heard of this happening to people's elbow, but not their knee... I've read about meniscus tear but that seems to refer to not being able to straighten the leg for days at a time or longer, with what I'm describing its like its actually out of joint momentarily.