Quick post. Been having walking issues for a few years now (docs don’t know why). Yesterday started to have an ‘attack’ where one of my parts starts hurting: knees, hip, heels, toes or calves (pick up, then move the pain around). I was trying to get up off a chair and lost my balance. Feel backyard and ripped something in the knee. Wife & daughter claim they’ve never heard me scream like that. I believe them. More later.