KAREN, I CALLED THE NURSE TODAY AND SHE SAID IT WAS NORMAL FOR IT TO POP LIKE THAT, SAID THE PIN WASN'T GOING ANYWHERE, SO I GUESS IT'S O.K. BEST TO BE SURE THO. HOPE YOU HAD A GOOD DAY. MVB ES

That's good news...sometimes the tendons will make a popping sound and occasionally air in the "joint" will pop. I didn't want to say everything was probably okay until you talked with your doc's office.
Orthopedics certainly isn't my "forte".