Ribs after goat punches

Tonight after I did the goat punches and then I did my standing, I was trying to look for the transverse couple. But instead instead I actually felt a flat stretching feeling at the back where the bottom of the ribs are located. I thought when we first did the stillness exercise the stillness was supposed to be around the front of the bottom of the ribs. Is this stretch of the back of the ribs just something to notice or is this at all related to the stillness and/or the transverse couple?