I have had this snap poping thing for many years... It seems to flare my symptoms up... The only time it happens is when i look over my shoulder when driving... Suddenly you will hear the snapp and then I have to pull over because i experince weakness in my arm... My mom or friends have had to pick me up on several occasions because i cant drive myself... It hurts like you cant believe... Its like the muscle slips or something... I do feel for you...

Hope all is well with everyone

Hugs