I can also pop my hip and can tell when it needs to be popped. Sometimes it hurts and sometimes it doesn't. I never really thought I had a hip problem but while in physical therapy for a leg problem they decided to check out my hips and told me I have Femoral Anterior Glide with Medial Rotation Syndrome. Sounds confusing, but it's when your hip joint is too far foward and the socket part of the joint kind of partially dislocates. My hip flexor muscles are really tight and so my flexability there really sucks. They made me do a bunch of exercises and taped my hip in place to try and fix it. It didn't really work. So if you have this, it's no biggie. You can freak people out if they hear your hip pop really loud.